diff --git a/.htaccess b/.htaccess
index 7cac6a1..eba3ddb 100644
--- a/.htaccess
+++ b/.htaccess
@@ -34,5 +34,5 @@ FileETag None
     Header set X-Content-Type-Options nosniff
     Header set X-XSS-Protection "1; mode=block"
     Header set Referrer-Policy no-referrer
-    Header set Content-Security-Policy "default-src 'self'; object-src 'none'; script-src 'none'; img-src http:"
+    Header set Content-Security-Policy "default-src 'self'; object-src 'none'; script-src 'none'; style-src 'self' 'unsafe-inline'; img-src http:"
 </ifmodule>
diff --git a/Gruntfile.js b/Gruntfile.js
index b198735..1238148 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -101,7 +101,7 @@ module.exports = function (grunt) {
                         'i18n/es_ES/LC_MESSAGES/Alltube.mo': 'i18n/es_ES/LC_MESSAGES/Alltube.po',
                         'i18n/de_DE/LC_MESSAGES/Alltube.mo': 'i18n/de_DE/LC_MESSAGES/Alltube.po',
                         'i18n/pt_BR/LC_MESSAGES/Alltube.mo': 'i18n/pt_BR/LC_MESSAGES/Alltube.po',
-                        'i18n/ar_001/LC_MESSAGES/Alltube.mo': 'i18n/ar_001/LC_MESSAGES/Alltube.po'
+                        'i18n/ar/LC_MESSAGES/Alltube.mo': 'i18n/ar/LC_MESSAGES/Alltube.po'
                     }
                 }
             },
diff --git a/app.json b/app.json
index 848962c..edc1929 100644
--- a/app.json
+++ b/app.json
@@ -17,14 +17,14 @@
     {
       "url": "https://github.com/piotras/heroku-buildpack-gettext.git"
     },
+    {
+      "url": "heroku/php"
+    },
     {
       "url": "heroku/nodejs"
     },
     {
       "url": "heroku/python"
-    },
-    {
-      "url": "heroku/php"
     }
   ],
   "env": {
diff --git a/classes/Config.php b/classes/Config.php
index ea98a85..e4454dc 100644
--- a/classes/Config.php
+++ b/classes/Config.php
@@ -8,6 +8,7 @@ namespace Alltube;
 
 use Exception;
 use Symfony\Component\Yaml\Yaml;
+use Jawira\CaseConverter\Convert;
 
 /**
  * Manage config parameters.
@@ -134,6 +135,13 @@ class Config
      */
     public $genericFormats = [];
 
+    /**
+     * Enable debug mode.
+     *
+     * @var bool
+     */
+    public $debug = false;
+
     /**
      * Config constructor.
      *
@@ -222,17 +230,18 @@ class Config
 
     /**
      * Override options from environement variables.
-     * Supported environment variables: CONVERT, PYTHON, AUDIO_BITRATE.
+     * Environment variables should use screaming snake case: CONVERT, PYTHON, AUDIO_BITRATE, etc.
+     * If the value is an array, you should use the YAML format: "CONVERT_ADVANCED_FORMATS='[foo, bar]'"
      *
      * @return void
      */
     private function getEnv()
     {
-        foreach (['CONVERT', 'PYTHON', 'AUDIO_BITRATE', 'STREAM'] as $var) {
-            $env = getenv($var);
+        foreach (get_object_vars($this) as $prop => $value) {
+            $convert = new Convert($prop);
+            $env = getenv($convert->toSnake(true));
             if ($env) {
-                $prop = lcfirst(str_replace('_', '', ucwords(strtolower($var), '_')));
-                $this->$prop = $env;
+                $this->$prop = Yaml::parse($env);
             }
         }
     }
diff --git a/classes/Locale.php b/classes/Locale.php
index 6418df7..50e9055 100644
--- a/classes/Locale.php
+++ b/classes/Locale.php
@@ -38,7 +38,9 @@ class Locale
     {
         $parse = AcceptLanguage::parse($locale);
         $this->language = $parse[1]['language'];
-        $this->region = $parse[1]['region'];
+        if (!empty($parse[1]['region'])) {
+            $this->region = $parse[1]['region'];
+        }
     }
 
     /**
@@ -68,7 +70,11 @@ class Locale
      */
     public function getIso15897()
     {
-        return $this->language . '_' . $this->region;
+        if (isset($this->region)) {
+            return $this->language . '_' . $this->region;
+        } else {
+            return $this->language;
+        }
     }
 
     /**
@@ -78,7 +84,11 @@ class Locale
      */
     public function getBcp47()
     {
-        return $this->language . '-' . $this->region;
+        if (isset($this->region)) {
+            return $this->language . '-' . $this->region;
+        } else {
+            return $this->language;
+        }
     }
 
     /**
@@ -98,6 +108,8 @@ class Locale
      */
     public function getCountry()
     {
-        return country($this->getIso3166());
+        if (isset($this->region)) {
+            return country($this->getIso3166());
+        }
     }
 }
diff --git a/classes/LocaleManager.php b/classes/LocaleManager.php
index 81ed684..2f42d3a 100644
--- a/classes/LocaleManager.php
+++ b/classes/LocaleManager.php
@@ -8,6 +8,8 @@ namespace Alltube;
 
 use Aura\Session\Segment;
 use Symfony\Component\Process\Process;
+use Symfony\Component\Translation\Translator;
+use Symfony\Component\Translation\Loader\MoFileLoader;
 
 /**
  * Class used to manage locales.
@@ -19,7 +21,7 @@ class LocaleManager
      *
      * @var array
      */
-    private $supportedLocales = ['en_US', 'fr_FR', 'zh_CN', 'es_ES', 'pt_BR', 'de_DE', 'ar_001'];
+    private $supportedLocales = ['en_US', 'fr_FR', 'zh_CN', 'es_ES', 'pt_BR', 'de_DE', 'ar'];
 
     /**
      * Current locale.
@@ -35,19 +37,49 @@ class LocaleManager
      */
     private $sessionSegment;
 
+    /**
+     * Default locale.
+     *
+     * @var string
+     */
+    private const DEFAULT_LOCALE = 'en';
+
+    /**
+     * Symfony Translator instance.
+     *
+     * @var Translator
+     */
+    private $translator;
+
+    /**
+     * Singleton instance.
+     *
+     * @var LocaleManager|null
+     */
+    private static $instance;
+
     /**
      * LocaleManager constructor.
      */
-    public function __construct()
+    private function __construct()
     {
         $session = SessionManager::getSession();
         $this->sessionSegment = $session->getSegment(self::class);
         $cookieLocale = $this->sessionSegment->get('locale');
+
+        $this->translator = new Translator(self::DEFAULT_LOCALE);
         if (isset($cookieLocale)) {
             $this->setLocale(new Locale($cookieLocale));
         }
-        bindtextdomain('Alltube', __DIR__ . '/../i18n/');
-        textdomain('Alltube');
+
+        $this->translator->addLoader('gettext', new MoFileLoader());
+        foreach ($this->getSupportedLocales() as $locale) {
+            $this->translator->addResource(
+                'gettext',
+                __DIR__ . '/../i18n/' . $locale->getIso15897() . '/LC_MESSAGES/Alltube.mo',
+                $locale->getIso15897()
+            );
+        }
     }
 
     /**
@@ -58,16 +90,9 @@ class LocaleManager
     public function getSupportedLocales()
     {
         $return = [];
-        $process = new Process(['locale', '-a']);
-        $process->run();
-        $installedLocales = explode(PHP_EOL, trim($process->getOutput()));
+
         foreach ($this->supportedLocales as $supportedLocale) {
-            if (
-                in_array($supportedLocale, $installedLocales)
-                || in_array($supportedLocale . '.utf8', $installedLocales)
-            ) {
-                $return[] = new Locale($supportedLocale);
-            }
+            $return[] = new Locale($supportedLocale);
         }
 
         return $return;
@@ -90,8 +115,7 @@ class LocaleManager
      */
     public function setLocale(Locale $locale)
     {
-        putenv('LANG=' . $locale);
-        setlocale(LC_ALL, [$locale . '.utf8', $locale]);
+        $this->translator->setLocale($locale->getIso15897());
         $this->curLocale = $locale;
         $this->sessionSegment->set('locale', $locale);
     }
@@ -101,7 +125,61 @@ class LocaleManager
      */
     public function unsetLocale()
     {
+        $this->translator->setLocale(self::DEFAULT_LOCALE);
         $this->curLocale = null;
         $this->sessionSegment->clear();
     }
+
+    /**
+     * Smarty "t" block.
+     *
+     * @param  array  $params Block parameters
+     * @param  string $text  Block content
+     *
+     * @return string Translated string
+     */
+    public function smartyTranslate(array $params, $text)
+    {
+        if (isset($params['params'])) {
+            return $this->t($text, $params['params']);
+        } else {
+            return $this->t($text);
+        }
+    }
+
+    /**
+     * Translate a string.
+     *
+     * @param string $string String to translate
+     *
+     * @return string Translated string
+     */
+    public function t($string, array $params = [])
+    {
+        return $this->translator->trans($string, $params);
+    }
+
+    /**
+     * Get LocaleManager singleton instance.
+     *
+     * @return LocaleManager
+     */
+    public static function getInstance()
+    {
+        if (!isset(self::$instance)) {
+            self::$instance = new self();
+        }
+
+        return self::$instance;
+    }
+
+    /**
+     * Destroy singleton instance.
+     *
+     * @return void
+     */
+    public static function destroyInstance()
+    {
+        self::$instance = null;
+    }
 }
diff --git a/classes/Video.php b/classes/Video.php
index f368385..a50983f 100644
--- a/classes/Video.php
+++ b/classes/Video.php
@@ -74,6 +74,13 @@ class Video
      */
     private $urls;
 
+    /**
+     * LocaleManager instance.
+     *
+     * @var LocaleManager
+     */
+    protected $localeManager;
+
     /**
      * VideoDownload constructor.
      *
@@ -87,6 +94,8 @@ class Video
         $this->requestedFormat = $requestedFormat;
         $this->password = $password;
         $this->config = Config::getInstance();
+
+        $this->localeManager = LocaleManager::getInstance();
     }
 
     /**
@@ -116,7 +125,9 @@ class Video
      * */
     public static function getExtractors()
     {
-        return explode("\n", trim(self::callYoutubedl(['--list-extractors'])));
+        $video = new self('');
+
+        return explode("\n", trim($video->callYoutubedl(['--list-extractors'])));
     }
 
     /**
@@ -130,7 +141,7 @@ class Video
      *
      * @return string Result
      */
-    private static function callYoutubedl(array $arguments)
+    private function callYoutubedl(array $arguments)
     {
         $config = Config::getInstance();
 
@@ -145,7 +156,7 @@ class Video
             if ($errorOutput == 'ERROR: This video is protected by a password, use the --video-password option') {
                 throw new PasswordException($errorOutput, $exitCode);
             } elseif (substr($errorOutput, 0, 21) == 'ERROR: Wrong password') {
-                throw new Exception(_('Wrong password'), $exitCode);
+                throw new Exception($this->localeManager->t('Wrong password'), $exitCode);
             } else {
                 throw new Exception($errorOutput, $exitCode);
             }
@@ -177,7 +188,7 @@ class Video
             $arguments[] = $this->password;
         }
 
-        return $this::callYoutubedl($arguments);
+        return $this->callYoutubedl($arguments);
     }
 
     /**
@@ -236,7 +247,7 @@ class Video
             $this->urls = explode("\n", $this->getProp('get-url'));
 
             if (empty($this->urls[0])) {
-                throw new EmptyUrlException(_('youtube-dl returned an empty URL.'));
+                throw new EmptyUrlException($this->localeManager->t('youtube-dl returned an empty URL.'));
             }
         }
 
@@ -345,7 +356,12 @@ class Video
         $to = null
     ) {
         if (!$this->checkCommand([$this->config->avconv, '-version'])) {
-            throw new Exception(_('Can\'t find avconv or ffmpeg at ') . $this->config->avconv . '.');
+            throw new Exception(
+                $this->localeManager->t(
+                    "Can't find avconv or ffmpeg at @path.",
+                    ['@path' => $this->config->avconv]
+                )
+            );
         }
 
         $durationRegex = '/(\d+:)?(\d+:)?(\d+)/';
@@ -358,14 +374,14 @@ class Video
 
         if (!empty($from)) {
             if (!preg_match($durationRegex, $from)) {
-                throw new Exception(_('Invalid start time: ') . $from . '.');
+                throw new Exception($this->localeManager->t('Invalid start time: @from.', ['@from' => $from]));
             }
             $afterArguments[] = '-ss';
             $afterArguments[] = $from;
         }
         if (!empty($to)) {
             if (!preg_match($durationRegex, $to)) {
-                throw new Exception(_('Invalid end time: ') . $to . '.');
+                throw new Exception($this->localeManager->t('Invalid end time: @to.', ['@to' => $to]));
             }
             $afterArguments[] = '-to';
             $afterArguments[] = $to;
@@ -411,14 +427,14 @@ class Video
     public function getAudioStream($from = null, $to = null)
     {
         if (isset($this->_type) && $this->_type == 'playlist') {
-            throw new Exception(_('Conversion of playlists is not supported.'));
+            throw new Exception($this->localeManager->t('Conversion of playlists is not supported.'));
         }
 
         if (isset($this->protocol)) {
             if (in_array($this->protocol, ['m3u8', 'm3u8_native'])) {
-                throw new Exception(_('Conversion of M3U8 files is not supported.'));
+                throw new Exception($this->localeManager->t('Conversion of M3U8 files is not supported.'));
             } elseif ($this->protocol == 'http_dash_segments') {
-                throw new Exception(_('Conversion of DASH segments is not supported.'));
+                throw new Exception($this->localeManager->t('Conversion of DASH segments is not supported.'));
             }
         }
 
@@ -427,7 +443,7 @@ class Video
         $stream = popen($avconvProc->getCommandLine(), 'r');
 
         if (!is_resource($stream)) {
-            throw new Exception(_('Could not open popen stream.'));
+            throw new Exception($this->localeManager->t('Could not open popen stream.'));
         }
 
         return $stream;
@@ -444,7 +460,12 @@ class Video
     public function getM3uStream()
     {
         if (!$this->checkCommand([$this->config->avconv, '-version'])) {
-            throw new Exception(_('Can\'t find avconv or ffmpeg at ') . $this->config->avconv . '.');
+            throw new Exception(
+                $this->localeManager->t(
+                    "Can't find avconv or ffmpeg at @path.",
+                    ['@path' => $this->config->avconv]
+                )
+            );
         }
 
         $urls = $this->getUrl();
@@ -464,7 +485,7 @@ class Video
 
         $stream = popen($process->getCommandLine(), 'r');
         if (!is_resource($stream)) {
-            throw new Exception(_('Could not open popen stream.'));
+            throw new Exception($this->localeManager->t('Could not open popen stream.'));
         }
 
         return $stream;
@@ -482,7 +503,7 @@ class Video
         $urls = $this->getUrl();
 
         if (!isset($urls[0]) || !isset($urls[1])) {
-            throw new Exception(_('This video does not have two URLs.'));
+            throw new Exception($this->localeManager->t('This video does not have two URLs.'));
         }
 
         $process = new Process(
@@ -501,7 +522,7 @@ class Video
 
         $stream = popen($process->getCommandLine(), 'r');
         if (!is_resource($stream)) {
-            throw new Exception(_('Could not open popen stream.'));
+            throw new Exception($this->localeManager->t('Could not open popen stream.'));
         }
 
         return $stream;
@@ -534,7 +555,7 @@ class Video
         );
         $stream = popen($process->getCommandLine(), 'r');
         if (!is_resource($stream)) {
-            throw new Exception(_('Could not open popen stream.'));
+            throw new Exception($this->localeManager->t('Could not open popen stream.'));
         }
 
         return $stream;
@@ -554,7 +575,7 @@ class Video
     public function getConvertedStream($audioBitrate, $filetype)
     {
         if (in_array($this->protocol, ['m3u8', 'm3u8_native'])) {
-            throw new Exception(_('Conversion of M3U8 files is not supported.'));
+            throw new Exception($this->localeManager->t('Conversion of M3U8 files is not supported.'));
         }
 
         $avconvProc = $this->getAvconvProcess($audioBitrate, $filetype, false);
@@ -562,7 +583,7 @@ class Video
         $stream = popen($avconvProc->getCommandLine(), 'r');
 
         if (!is_resource($stream)) {
-            throw new Exception(_('Could not open popen stream.'));
+            throw new Exception($this->localeManager->t('Could not open popen stream.'));
         }
 
         return $stream;
@@ -592,6 +613,13 @@ class Video
         $client = new Client();
         $urls = $this->getUrl();
 
-        return $client->request('GET', $urls[0], ['stream' => true, 'headers' => $headers]);
+        return $client->request(
+            'GET',
+            $urls[0],
+            [
+                'stream' => true,
+                'headers' => array_merge((array) $this->http_headers, $headers)
+            ]
+        );
     }
 }
diff --git a/classes/ViewFactory.php b/classes/ViewFactory.php
index a78efd7..835b471 100644
--- a/classes/ViewFactory.php
+++ b/classes/ViewFactory.php
@@ -35,9 +35,12 @@ class ViewFactory
             $request = $request->withUri($request->getUri()->withScheme('https')->withPort(443));
         }
 
+        $localeManager = $container['locale'];
+
         $smartyPlugins = new SmartyPlugins($container['router'], $request->getUri()->withUserInfo(null));
         $view->registerPlugin('function', 'path_for', [$smartyPlugins, 'pathFor']);
         $view->registerPlugin('function', 'base_url', [$smartyPlugins, 'baseUrl']);
+        $view->registerPlugin('block', 't', [$localeManager, 'smartyTranslate']);
 
         return $view;
     }
diff --git a/composer.json b/composer.json
index 5d2c0fc..c7065b3 100644
--- a/composer.json
+++ b/composer.json
@@ -12,11 +12,12 @@
     "guzzlehttp/guzzle": "~6.3.0",
     "aura/session": "~2.1.0",
     "barracudanetworks/archivestream-php": "~1.0.5",
-    "smarty-gettext/smarty-gettext": "~1.6.0",
     "zonuexe/http-accept-language": "~0.4.1",
     "rinvex/countries": "~3.1.0",
     "php-mock/php-mock-mockery": "~1.3.0",
-    "ext-xsl": "*"
+    "ext-xsl": "*",
+    "jawira/case-converter": "^1.2",
+    "symfony/translation": "^3.4"
   },
   "require-dev": {
     "symfony/var-dumper": "~3.4.1",
@@ -27,7 +28,8 @@
     "heroku/heroku-buildpack-php": "^162.0",
     "anam/phantomjs-linux-x86-binary": "~2.1.1",
     "phpstan/phpstan": "~0.9.2",
-    "roave/security-advisories": "dev-master"
+    "roave/security-advisories": "dev-master",
+    "smarty-gettext/smarty-gettext": "^1.6"
   },
   "extra": {
     "paas": {
@@ -90,7 +92,7 @@
     "compile": "composer install --ignore-platform-reqs",
     "update-locales": [
       "tsmarty2c.php templates > i18n/template.pot",
-      "xgettext --omit-header -j -o i18n/template.pot classes/* controllers/*"
+      "xgettext --omit-header -kt -j -o i18n/template.pot classes/*.php classes/*/*.php controllers/*"
     ],
     "youtube-dl": "vendor/rg3/youtube-dl/youtube_dl/__main__.py"
   },
diff --git a/composer.lock b/composer.lock
index 2b960a4..0cdbc1b 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "07b922cb69b4f4dbd5e537656d559c8d",
+    "content-hash": "c773a24c670cb4c431217ea94f03b942",
     "packages": [
         {
             "name": "aura/session",
@@ -137,6 +137,7 @@
             ],
             "description": "Promoting the interoperability of container objects (DIC, SL, etc.)",
             "homepage": "https://github.com/container-interop/container-interop",
+            "abandoned": "psr/container",
             "time": "2017-02-14T19:40:03+00:00"
         },
         {
@@ -374,6 +375,50 @@
             ],
             "time": "2016-01-20T08:20:44+00:00"
         },
+        {
+            "name": "jawira/case-converter",
+            "version": "v1.2.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/jawira/case-converter.git",
+                "reference": "79716629a298e44507a8eed9b997968f39367abc"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/jawira/case-converter/zipball/79716629a298e44507a8eed9b997968f39367abc",
+                "reference": "79716629a298e44507a8eed9b997968f39367abc",
+                "shasum": ""
+            },
+            "require": {
+                "ext-mbstring": "*",
+                "php": ">=5.4"
+            },
+            "suggest": {
+                "pds/skeleton": "PHP Package Development Standards"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Jawira\\CaseConverter\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Jawira Portugal"
+                }
+            ],
+            "description": "Convert string between **Camel Case** ?, **Snake Case** ?and **Kebab Case** ?.",
+            "keywords": [
+                "camel case",
+                "kebab case",
+                "snake case"
+            ],
+            "time": "2019-03-18T05:59:08+00:00"
+        },
         {
             "name": "mathmarques/smarty-view",
             "version": "1.1.2",
@@ -1078,61 +1123,6 @@
             ],
             "time": "2019-04-16T16:47:29+00:00"
         },
-        {
-            "name": "smarty-gettext/smarty-gettext",
-            "version": "1.6.1",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/smarty-gettext/smarty-gettext.git",
-                "reference": "9a7d9284b5374caeae5eb226cf486efb4bc748b4"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/smarty-gettext/smarty-gettext/zipball/9a7d9284b5374caeae5eb226cf486efb4bc748b4",
-                "reference": "9a7d9284b5374caeae5eb226cf486efb4bc748b4",
-                "shasum": ""
-            },
-            "require": {
-                "ext-gettext": "*",
-                "ext-pcre": "*",
-                "php": "~5.3|~7.0"
-            },
-            "require-dev": {
-                "azatoth/php-pgettext": "~1.0",
-                "phpunit/phpunit": ">=4.8.36",
-                "smarty/smarty": "3.1.*"
-            },
-            "suggest": {
-                "azatoth/php-pgettext": "Support msgctxt for {t} via context parameter"
-            },
-            "bin": [
-                "tsmarty2c.php"
-            ],
-            "type": "library",
-            "autoload": {
-                "files": [
-                    "block.t.php",
-                    "function.locale.php"
-                ]
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "LGPL-2.1"
-            ],
-            "authors": [
-                {
-                    "name": "Sagi Bashari",
-                    "email": "sagi@boom.org.il"
-                },
-                {
-                    "name": "Elan Ruusamäe",
-                    "email": "glen@delfi.ee"
-                }
-            ],
-            "description": "Gettext plugin enabling internationalization in Smarty Package files",
-            "homepage": "https://github.com/smarty-gettext/smarty-gettext",
-            "time": "2019-01-17T23:06:53+00:00"
-        },
         {
             "name": "smarty/smarty",
             "version": "v3.1.33",
@@ -1244,6 +1234,65 @@
             ],
             "time": "2019-02-06T07:57:58+00:00"
         },
+        {
+            "name": "symfony/polyfill-mbstring",
+            "version": "v1.11.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/polyfill-mbstring.git",
+                "reference": "fe5e94c604826c35a32fa832f35bd036b6799609"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/fe5e94c604826c35a32fa832f35bd036b6799609",
+                "reference": "fe5e94c604826c35a32fa832f35bd036b6799609",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.3"
+            },
+            "suggest": {
+                "ext-mbstring": "For best performance"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.11-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Polyfill\\Mbstring\\": ""
+                },
+                "files": [
+                    "bootstrap.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Nicolas Grekas",
+                    "email": "p@tchwork.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony polyfill for the Mbstring extension",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "compatibility",
+                "mbstring",
+                "polyfill",
+                "portable",
+                "shim"
+            ],
+            "time": "2019-02-06T07:57:58+00:00"
+        },
         {
             "name": "symfony/process",
             "version": "v3.4.29",
@@ -1293,6 +1342,76 @@
             "homepage": "https://symfony.com",
             "time": "2019-05-30T15:47:52+00:00"
         },
+        {
+            "name": "symfony/translation",
+            "version": "v3.4.35",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/translation.git",
+                "reference": "2031c895bc97ac1787d418d90bd1ed7d299f2772"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/translation/zipball/2031c895bc97ac1787d418d90bd1ed7d299f2772",
+                "reference": "2031c895bc97ac1787d418d90bd1ed7d299f2772",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^5.5.9|>=7.0.8",
+                "symfony/polyfill-mbstring": "~1.0"
+            },
+            "conflict": {
+                "symfony/config": "<2.8",
+                "symfony/dependency-injection": "<3.4",
+                "symfony/yaml": "<3.4"
+            },
+            "require-dev": {
+                "psr/log": "~1.0",
+                "symfony/config": "~2.8|~3.0|~4.0",
+                "symfony/dependency-injection": "~3.4|~4.0",
+                "symfony/finder": "~2.8|~3.0|~4.0",
+                "symfony/http-kernel": "~3.4|~4.0",
+                "symfony/intl": "^2.8.18|^3.2.5|~4.0",
+                "symfony/var-dumper": "~3.4|~4.0",
+                "symfony/yaml": "~3.4|~4.0"
+            },
+            "suggest": {
+                "psr/log-implementation": "To use logging capability in translator",
+                "symfony/config": "",
+                "symfony/yaml": ""
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.4-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Component\\Translation\\": ""
+                },
+                "exclude-from-classmap": [
+                    "/Tests/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony Translation Component",
+            "homepage": "https://symfony.com",
+            "time": "2019-10-30T12:43:22+00:00"
+        },
         {
             "name": "symfony/yaml",
             "version": "v3.4.29",
@@ -3829,6 +3948,61 @@
             "homepage": "https://github.com/sebastianbergmann/version",
             "time": "2016-10-03T07:35:21+00:00"
         },
+        {
+            "name": "smarty-gettext/smarty-gettext",
+            "version": "1.6.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/smarty-gettext/smarty-gettext.git",
+                "reference": "9a7d9284b5374caeae5eb226cf486efb4bc748b4"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/smarty-gettext/smarty-gettext/zipball/9a7d9284b5374caeae5eb226cf486efb4bc748b4",
+                "reference": "9a7d9284b5374caeae5eb226cf486efb4bc748b4",
+                "shasum": ""
+            },
+            "require": {
+                "ext-gettext": "*",
+                "ext-pcre": "*",
+                "php": "~5.3|~7.0"
+            },
+            "require-dev": {
+                "azatoth/php-pgettext": "~1.0",
+                "phpunit/phpunit": ">=4.8.36",
+                "smarty/smarty": "3.1.*"
+            },
+            "suggest": {
+                "azatoth/php-pgettext": "Support msgctxt for {t} via context parameter"
+            },
+            "bin": [
+                "tsmarty2c.php"
+            ],
+            "type": "library",
+            "autoload": {
+                "files": [
+                    "block.t.php",
+                    "function.locale.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "LGPL-2.1"
+            ],
+            "authors": [
+                {
+                    "name": "Sagi Bashari",
+                    "email": "sagi@boom.org.il"
+                },
+                {
+                    "name": "Elan Ruusamäe",
+                    "email": "glen@delfi.ee"
+                }
+            ],
+            "description": "Gettext plugin enabling internationalization in Smarty Package files",
+            "homepage": "https://github.com/smarty-gettext/smarty-gettext",
+            "time": "2019-01-17T23:06:53+00:00"
+        },
         {
             "name": "squizlabs/php_codesniffer",
             "version": "3.5.0",
@@ -4057,65 +4231,6 @@
             "homepage": "https://symfony.com",
             "time": "2019-05-30T15:47:52+00:00"
         },
-        {
-            "name": "symfony/polyfill-mbstring",
-            "version": "v1.11.0",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/symfony/polyfill-mbstring.git",
-                "reference": "fe5e94c604826c35a32fa832f35bd036b6799609"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/fe5e94c604826c35a32fa832f35bd036b6799609",
-                "reference": "fe5e94c604826c35a32fa832f35bd036b6799609",
-                "shasum": ""
-            },
-            "require": {
-                "php": ">=5.3.3"
-            },
-            "suggest": {
-                "ext-mbstring": "For best performance"
-            },
-            "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-master": "1.11-dev"
-                }
-            },
-            "autoload": {
-                "psr-4": {
-                    "Symfony\\Polyfill\\Mbstring\\": ""
-                },
-                "files": [
-                    "bootstrap.php"
-                ]
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Nicolas Grekas",
-                    "email": "p@tchwork.com"
-                },
-                {
-                    "name": "Symfony Community",
-                    "homepage": "https://symfony.com/contributors"
-                }
-            ],
-            "description": "Symfony polyfill for the Mbstring extension",
-            "homepage": "https://symfony.com",
-            "keywords": [
-                "compatibility",
-                "mbstring",
-                "polyfill",
-                "portable",
-                "shim"
-            ],
-            "time": "2019-02-06T07:57:58+00:00"
-        },
         {
             "name": "symfony/var-dumper",
             "version": "v3.4.29",
diff --git a/config/config.example.yml b/config/config.example.yml
index 3cd1fe0..022e612 100644
--- a/config/config.example.yml
+++ b/config/config.example.yml
@@ -51,3 +51,6 @@ genericFormats:
     best: Best
     bestvideo+bestaudio: Remux best video with best audio
     worst: Worst
+
+# Enable debug mode.
+debug: false
diff --git a/controllers/BaseController.php b/controllers/BaseController.php
index e555a6f..59e9862 100644
--- a/controllers/BaseController.php
+++ b/controllers/BaseController.php
@@ -7,6 +7,7 @@
 namespace Alltube\Controller;
 
 use Alltube\Config;
+use Alltube\LocaleManager;
 use Alltube\SessionManager;
 use Alltube\Video;
 use Aura\Session\Segment;
@@ -53,6 +54,13 @@ abstract class BaseController
      */
     protected $sessionSegment;
 
+    /**
+     * LocaleManager instance.
+     *
+     * @var LocaleManager
+     */
+    protected $localeManager;
+
     /**
      * BaseController constructor.
      *
@@ -64,6 +72,7 @@ abstract class BaseController
         $this->container = $container;
         $session = SessionManager::getSession();
         $this->sessionSegment = $session->getSegment(self::class);
+        $this->localeManager = $this->container->get('locale');
 
         if ($this->config->stream) {
             $this->defaultFormat = 'best';
diff --git a/controllers/DownloadController.php b/controllers/DownloadController.php
index b3f3f3c..7862b6c 100644
--- a/controllers/DownloadController.php
+++ b/controllers/DownloadController.php
@@ -166,7 +166,7 @@ class DownloadController extends BaseController
             $response = $response->withHeader('Content-Type', 'video/' . $this->video->ext);
             $body = new Stream($this->video->getM3uStream());
         } else {
-            $headers = (array) $this->video->http_headers;
+            $headers = [];
             $range = $request->getHeader('Range');
 
             if (!empty($range)) {
@@ -212,7 +212,7 @@ class DownloadController extends BaseController
     private function getRemuxStream(Request $request, Response $response)
     {
         if (!$this->config->remux) {
-            throw new Exception(_('You need to enable remux mode to merge two formats.'));
+            throw new Exception($this->localeManager->t('You need to enable remux mode to merge two formats.'));
         }
         $stream = $this->video->getRemuxStream();
         $response = $response->withHeader('Content-Type', 'video/x-matroska');
@@ -222,7 +222,7 @@ class DownloadController extends BaseController
 
         return $response->withHeader(
             'Content-Disposition',
-            'attachment; filename="' . $this->video->getFileNameWithExtension('mkv')
+            'attachment; filename="' . $this->video->getFileNameWithExtension('mkv') . '"'
         );
     }
 
@@ -252,7 +252,7 @@ class DownloadController extends BaseController
             return $this->getStream($request, $response);
         } else {
             if (empty($videoUrls[0])) {
-                throw new Exception(_("Can't find URL of video."));
+                throw new Exception($this->localeManager->t("Can't find URL of video."));
             }
 
             return $response->withRedirect($videoUrls[0]);
diff --git a/controllers/FrontController.php b/controllers/FrontController.php
index 733bbd5..a56af7e 100644
--- a/controllers/FrontController.php
+++ b/controllers/FrontController.php
@@ -8,14 +8,16 @@ namespace Alltube\Controller;
 
 use Alltube\Exception\PasswordException;
 use Alltube\Locale;
-use Alltube\LocaleManager;
 use Alltube\Video;
+use Throwable;
 use Exception;
 use Psr\Container\ContainerInterface;
 use Slim\Container;
 use Slim\Http\Request;
 use Slim\Http\Response;
 use Slim\Views\Smarty;
+use Symfony\Component\Debug\ExceptionHandler;
+use Symfony\Component\Debug\Exception\FatalThrowableError;
 
 /**
  * Main controller.
@@ -29,13 +31,6 @@ class FrontController extends BaseController
      */
     private $view;
 
-    /**
-     * LocaleManager instance.
-     *
-     * @var LocaleManager
-     */
-    private $localeManager;
-
     /**
      * BaseController constructor.
      *
@@ -45,7 +40,6 @@ class FrontController extends BaseController
     {
         parent::__construct($container);
 
-        $this->localeManager = $this->container->get('locale');
         $this->view = $this->container->get('view');
     }
 
@@ -66,7 +60,9 @@ class FrontController extends BaseController
             [
                 'config'           => $this->config,
                 'class'            => 'index',
-                'description'      => _('Easily download videos from Youtube, Dailymotion, Vimeo and other websites.'),
+                'description'      => $this->localeManager->t(
+                    'Easily download videos from Youtube, Dailymotion, Vimeo and other websites.'
+                ),
                 'domain'           => $uri->getScheme() . '://' . $uri->getAuthority(),
                 'canonical'        => $this->getCanonicalUrl($request),
                 'supportedLocales' => $this->localeManager->getSupportedLocales(),
@@ -110,8 +106,8 @@ class FrontController extends BaseController
                 'config'      => $this->config,
                 'extractors'  => Video::getExtractors(),
                 'class'       => 'extractors',
-                'title'       => _('Supported websites'),
-                'description' => _('List of all supported websites from which Alltube Download ' .
+                'title'       => $this->localeManager->t('Supported websites'),
+                'description' => $this->localeManager->t('List of all supported websites from which Alltube Download ' .
                     'can extract video or audio files'),
                 'canonical' => $this->getCanonicalUrl($request),
                 'locale'    => $this->localeManager->getLocale(),
@@ -137,8 +133,10 @@ class FrontController extends BaseController
             [
                 'config'      => $this->config,
                 'class'       => 'password',
-                'title'       => _('Password prompt'),
-                'description' => _('You need a password in order to download this video with Alltube Download'),
+                'title'       => $this->localeManager->t('Password prompt'),
+                'description' => $this->localeManager->t(
+                    'You need a password in order to download this video with Alltube Download'
+                ),
                 'canonical'   => $this->getCanonicalUrl($request),
                 'locale'      => $this->localeManager->getLocale(),
             ]
@@ -168,12 +166,20 @@ class FrontController extends BaseController
         } else {
             $template = 'info.tpl';
         }
-        $title = _('Video download');
-        $description = _('Download video from ') . $this->video->extractor_key;
+        $title = $this->localeManager->t('Video download');
+        $description = $this->localeManager->t(
+            'Download video from @extractor',
+            ['@extractor' => $this->video->extractor_key]
+        );
         if (isset($this->video->title)) {
             $title = $this->video->title;
-            $description = _('Download') . ' "' . $this->video->title . '" ' .
-                _('from') . ' ' . $this->video->extractor_key;
+            $description = $this->localeManager->t(
+                'Download @title from @extractor',
+                [
+                    '@title' => $this->video->title,
+                    '@extractor' => $this->video->extractor_key
+                ]
+            );
         }
         $this->view->render(
             $response,
@@ -233,18 +239,54 @@ class FrontController extends BaseController
      */
     public function error(Request $request, Response $response, Exception $exception)
     {
-        $this->view->render(
-            $response,
-            'error.tpl',
-            [
-                'config'    => $this->config,
-                'errors'    => $exception->getMessage(),
-                'class'     => 'video',
-                'title'     => _('Error'),
-                'canonical' => $this->getCanonicalUrl($request),
-                'locale'    => $this->localeManager->getLocale(),
-            ]
-        );
+        if ($this->config->debug) {
+            $handler = new ExceptionHandler();
+            $handler->handle($exception);
+        } else {
+            $this->view->render(
+                $response,
+                'error.tpl',
+                [
+                    'config'    => $this->config,
+                    'errors'    => $exception->getMessage(),
+                    'class'     => 'video',
+                    'title'     => $this->localeManager->t('Error'),
+                    'canonical' => $this->getCanonicalUrl($request),
+                    'locale'    => $this->localeManager->getLocale(),
+                ]
+            );
+        }
+
+        return $response->withStatus(500);
+    }
+
+    /**
+     * Display an error page for fatal errors.
+     *
+     * @param Request   $request   PSR-7 request
+     * @param Response  $response  PSR-7 response
+     * @param Throwable $error Error to display
+     *
+     * @return Response HTTP response
+     */
+    public function fatalError(Request $request, Response $response, Throwable $error)
+    {
+        if ($this->config->debug) {
+            $handler = new ExceptionHandler();
+            $handler->handle(new FatalThrowableError($error));
+        } else {
+            $this->view->render(
+                $response,
+                'error.tpl',
+                [
+                    'config'    => $this->config,
+                    'class'     => 'video',
+                    'title'     => $this->localeManager->t('Error'),
+                    'canonical' => $this->getCanonicalUrl($request),
+                    'locale'    => $this->localeManager->getLocale(),
+                ]
+            );
+        }
 
         return $response->withStatus(500);
     }
diff --git a/i18n/ar_001/LC_MESSAGES/Alltube.po b/i18n/ar/LC_MESSAGES/Alltube.po
similarity index 100%
rename from i18n/ar_001/LC_MESSAGES/Alltube.po
rename to i18n/ar/LC_MESSAGES/Alltube.po
diff --git a/i18n/es_ES/LC_MESSAGES/Alltube.po b/i18n/es_ES/LC_MESSAGES/Alltube.po
index 3562254..a6914ec 100644
--- a/i18n/es_ES/LC_MESSAGES/Alltube.po
+++ b/i18n/es_ES/LC_MESSAGES/Alltube.po
@@ -9,15 +9,15 @@ msgstr ""
 
 #: templates/error.tpl:6
 msgid "Please check the URL of your video."
-msgstr "Porfavor, revise la URL de su video."
+msgstr "Por favor, revise la URL de su vídeo."
 
 #: templates/playlist.tpl:5
 msgid "Videos extracted from"
-msgstr "Videos extraidos desde"
+msgstr "Vídeos extraídos desde"
 
 #: templates/playlist.tpl:7
 msgid ":"
-msgstr ""
+msgstr ":"
 
 #: templates/playlist.tpl:26 templates/password.tpl:10 templates/video.tpl:83
 #: templates/video.tpl:86 templates/index.tpl:18
@@ -55,23 +55,23 @@ msgstr "Formatos disponibles:"
 
 #: templates/video.tpl:29
 msgid "Generic formats"
-msgstr "Formatos genericos"
+msgstr "Formatos genéricos"
 
 #: templates/video.tpl:32
 msgid "Best"
-msgstr "Mejor"
+msgstr "El mejor"
 
 #: templates/video.tpl:37
 msgid "Remux best video with best audio"
-msgstr ""
+msgstr "Usar la mejor calidad de vídeo y audio"
 
 #: templates/video.tpl:41
 msgid "Worst"
-msgstr "Peor"
+msgstr "El peor"
 
 #: templates/video.tpl:44
 msgid "Detailed formats"
-msgstr ""
+msgstr "Formatos detallados"
 
 #: templates/inc/footer.tpl:4
 msgid "Code by"
@@ -107,11 +107,11 @@ msgstr "Compartir en Facebook"
 
 #: templates/index.tpl:8
 msgid "Copy here the URL of your video (Youtube, Dailymotion, etc.)"
-msgstr "Copia aqui la URL de tu video (Youtube, Dailymotion, etc.)"
+msgstr "Copia aquí la URL de tu vídeo (Youtube, Dailymotion, etc.)"
 
 #: templates/index.tpl:23
 msgid "Audio only (MP3)"
-msgstr "Solo audio (MP3)"
+msgstr "Sólo audio (MP3)"
 
 #: templates/index.tpl:28
 msgid "See all supported websites"
@@ -123,7 +123,7 @@ msgstr "Arrastra esto a tu barra de marcadores"
 
 #: templates/index.tpl:31
 msgid "Bookmarklet"
-msgstr ""
+msgstr "Marcador"
 
 #: templates/inc/header.tpl:4
 msgid "Switch language"
diff --git a/i18n/fr_FR/LC_MESSAGES/Alltube.po b/i18n/fr_FR/LC_MESSAGES/Alltube.po
index fa25dd4..c249db6 100644
--- a/i18n/fr_FR/LC_MESSAGES/Alltube.po
+++ b/i18n/fr_FR/LC_MESSAGES/Alltube.po
@@ -1,34 +1,61 @@
 msgid ""
 msgstr ""
+"Project-Id-Version: AllTube Download\n"
+"POT-Creation-Date: \n"
+"PO-Revision-Date: \n"
+"Last-Translator: \n"
+"Language-Team: \n"
+"Language: fr\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
-"X-Generator: POEditor.com\n"
-"Project-Id-Version: AllTube Download\n"
-"Language: fr\n"
+"X-Generator: Poedit 2.2.4\n"
 
-#: templates/error.tpl:6
-msgid "Please check the URL of your video."
-msgstr "Veuillez vérifier l'URL de votre vidéo"
+#: templates/playlist.tpl:13
+msgid "Videos extracted from @title:"
+msgstr "Vidéos extraites depuis @title&nbsp;:"
 
-#: templates/playlist.tpl:5
-msgid "Videos extracted from"
-msgstr "Vidéos extraites depuis"
-
-#: templates/playlist.tpl:7
-msgid ":"
-msgstr " :"
-
-#: templates/playlist.tpl:26 templates/video.tpl:96 templates/video.tpl:99
-#: templates/password.tpl:10 templates/index.tpl:19
-#: controllers/FrontController.php:315
+#: templates/playlist.tpl:38 templates/password.tpl:11 templates/index.tpl:19
+#: templates/info.tpl:98
 msgid "Download"
 msgstr "Télécharger"
 
-#: templates/playlist.tpl:27
+#: templates/playlist.tpl:39
 msgid "More options"
 msgstr "Plus d'options"
 
+#: templates/inc/header.tpl:4
+msgid "Switch language"
+msgstr "Changer de langue"
+
+#: templates/inc/header.tpl:8
+msgid "Set language"
+msgstr "Choisir la langue"
+
+#: templates/inc/footer.tpl:8
+msgid "Code by @dev"
+msgstr "Développé par @dev"
+
+#: templates/inc/footer.tpl:16
+msgid "Design by @designer"
+msgstr "Designé par @designer"
+
+#: templates/inc/footer.tpl:21
+msgid "Get the code"
+msgstr "Obtenir le code"
+
+#: templates/inc/footer.tpl:29
+msgid "Based on @youtubedl"
+msgstr "Basé sur @youtubedl"
+
+#: templates/inc/footer.tpl:33
+msgid "Donate using Liberapay"
+msgstr "Faire un don avec Liberapay"
+
+#: templates/inc/footer.tpl:35
+msgid "Donate"
+msgstr "Faire un don"
+
 #: templates/password.tpl:5
 msgid "This video is protected"
 msgstr "Cette vidéo est protégée"
@@ -41,62 +68,6 @@ msgstr "L'accès à cette vidéo nécessite un mot de passe."
 msgid "Video password"
 msgstr "Mot de passe de la vidéo"
 
-#: templates/extractors.tpl:4 controllers/FrontController.php:167
-msgid "Supported websites"
-msgstr "Sites web supportés"
-
-#: templates/video.tpl:6
-msgid "You are going to download"
-msgstr "Vous allez télécharger"
-
-#: templates/video.tpl:24
-msgid "Available formats:"
-msgstr "Formats disponibles :"
-
-#: templates/video.tpl:29
-msgid "Generic formats"
-msgstr "Formats génériques"
-
-#: templates/video.tpl:32
-msgid "Best"
-msgstr "Meilleure qualité"
-
-#: templates/video.tpl:37
-msgid "Remux best video with best audio"
-msgstr "Combiner la meilleure vidéo avec le meilleur audio"
-
-#: templates/video.tpl:41
-msgid "Worst"
-msgstr "Pire qualité"
-
-#: templates/video.tpl:44
-msgid "Detailed formats"
-msgstr "Formats détaillés"
-
-#: templates/inc/footer.tpl:4
-msgid "Code by"
-msgstr "Développé par"
-
-#: templates/inc/footer.tpl:6
-msgid "Design by"
-msgstr "Designé par"
-
-#: templates/inc/footer.tpl:10
-msgid "Get the code"
-msgstr "Obtenir le code"
-
-#: templates/inc/footer.tpl:12
-msgid "Based on"
-msgstr "Basé sur"
-
-#: templates/inc/header.tpl:21
-msgid "Share on Twitter"
-msgstr "Partager sur Twitter"
-
-#: templates/inc/header.tpl:23
-msgid "Share on Facebook"
-msgstr "Partager sur Facebook"
-
 #: templates/index.tpl:8
 msgid "Copy here the URL of your video (Youtube, Dailymotion, etc.)"
 msgstr "Copiez ici l'URL de votre vidéo (Youtube, Dailymotion, etc.)"
@@ -105,6 +76,14 @@ msgstr "Copiez ici l'URL de votre vidéo (Youtube, Dailymotion, etc.)"
 msgid "Audio only (MP3)"
 msgstr "Audio uniquement (MP3)"
 
+#: templates/index.tpl:28
+msgid "From"
+msgstr "À partir de"
+
+#: templates/index.tpl:29
+msgid "to"
+msgstr "jusqu'à"
+
 #: templates/index.tpl:36
 msgid "See all supported websites"
 msgstr "Voir tous les sites supportés"
@@ -117,121 +96,183 @@ msgstr "Glissez ce lien dans votre barre de favoris :"
 msgid "Bookmarklet"
 msgstr "Bookmarklet"
 
-#: templates/inc/header.tpl:4
-msgid "Switch language"
-msgstr "Changer de langue"
+#: templates/info.tpl:13
+msgid "You are going to download @title."
+msgstr "Vous allez télécharger @title."
+
+#: templates/info.tpl:31
+msgid "Available formats:"
+msgstr "Formats disponibles&nbsp;:"
+
+#: templates/info.tpl:33
+msgid "Generic formats"
+msgstr "Formats génériques"
+
+#: templates/info.tpl:38
+msgid "Detailed formats"
+msgstr "Formats détaillés"
+
+#: templates/info.tpl:80
+msgid "Stream the video through the server"
+msgstr "Transférer la vidéo à travers le serveur"
+
+#: templates/info.tpl:85
+msgid "Convert into a custom format:"
+msgstr "Convertir dans un format personnalisé :"
+
+#: templates/info.tpl:86
+msgid "Custom format"
+msgstr "Format personnalisé"
+
+#: templates/info.tpl:86
+msgid "Format to convert to"
+msgstr "Format vers lequel convertir"
+
+#: templates/info.tpl:91
+msgid "with"
+msgstr "avec de l'audio à"
+
+#: templates/info.tpl:92
+msgid "Bit rate"
+msgstr "Débit binaire"
+
+#: templates/info.tpl:93
+msgid "Custom bitrate"
+msgstr "Débit binaire personnalisé"
+
+#: templates/info.tpl:95
+msgid "kbit/s audio"
+msgstr "kbit/s"
 
 #: templates/error.tpl:5
 msgid "An error occurred"
 msgstr "Une erreur est survenue"
 
-#: templates/video.tpl:85
-msgid "Convert into a custom format:"
-msgstr "Convertir dans un format personnalisé :"
+#: templates/error.tpl:6
+msgid "Please check the URL of your video."
+msgstr "Veuillez vérifier l'URL de votre vidéo."
 
-#: templates/video.tpl:93
-msgid "kbit/s audio"
-msgstr "kbit/s"
+#: templates/extractors.tpl:4 controllers/FrontController.php:109
+msgid "Supported websites"
+msgstr "Sites web supportés"
 
-#: templates/video.tpl:91
-msgid "with"
-msgstr "avec de l'audio à"
+#: classes/Config.php:158
+msgid "Best"
+msgstr "Meilleure qualité"
 
-#: classes/VideoDownload.php:117
+#: classes/Config.php:159
+msgid "Remux best video with best audio"
+msgstr "Combiner la meilleure vidéo avec le meilleur audio"
+
+#: classes/Config.php:160
+msgid "Worst"
+msgstr "Pire qualité"
+
+#: classes/Video.php:159
 msgid "Wrong password"
 msgstr "Mauvais mot de passe"
 
-#: classes/VideoDownload.php:364 classes/VideoDownload.php:526
-msgid "Conversion of M3U8 files is not supported."
-msgstr "La conversion des fichiers M3U8 n'est pas possible."
-
-#: classes/VideoDownload.php:375 classes/VideoDownload.php:412
-#: classes/VideoDownload.php:445 classes/VideoDownload.php:478
-#: classes/VideoDownload.php:534
-msgid "Could not open popen stream."
-msgstr "Impossible d'ouvrir le flux popen."
-
-#: classes/VideoDownload.php:502
-msgid "Could not open fopen stream."
-msgstr "Impossible d'ouvrir le flux fopen."
-
-#: controllers/FrontController.php:124
-msgid "Easily download videos from Youtube, Dailymotion, Vimeo and other websites."
-msgstr "Téléchargez facilement des vidéos depuis Youtube, Dailymotion, Vimeo et d'autres sites web."
-
-#: controllers/FrontController.php:168
-msgid "List of all supported websites from which Alltube Download can extract video or audio files"
-msgstr "Liste de tous les sites web depuis lesquels Alltube Download peut extraire des fichiers vidéo ou audio"
-
-#: controllers/FrontController.php:193
-msgid "Password prompt"
-msgstr "Demande de mot de passe"
-
-#: controllers/FrontController.php:194
-msgid "You need a password in order to download this video with Alltube Download"
-msgstr "Vous avez besoin d'un mot de passe pour télécharger cette vidéo avec Alltube Download"
-
-#: controllers/FrontController.php:311
-msgid "Video download"
-msgstr "Téléchargement d'une vidéo"
-
-#: controllers/FrontController.php:312
-msgid "Download video from "
-msgstr "Téléchargement d'une vidéo depuis "
-
-#: controllers/FrontController.php:315
-msgid "from"
-msgstr "depuis"
-
-#: controllers/FrontController.php:378
-msgid "Error"
-msgstr "Erreur"
-
-#: controllers/FrontController.php:450
-msgid "You need to enable remux mode to merge two formats."
-msgstr "Vous devez activer le mode remux pour fusionner deux formats."
-
-#: controllers/FrontController.php:525
-msgid "Can't find URL of video."
-msgstr "Impossible de trouver l'URL de la vidéo."
-
-#: classes/VideoDownload.php:289 classes/VideoDownload.php:394
-msgid "Can't find avconv or ffmpeg at "
-msgstr "Impossible de trouver avconv ou ffmpeg à "
-
-#: templates/inc/footer.tpl:14
-msgid "Donate"
-msgstr "Faire un don"
-
-#: classes/VideoDownload.php:158
+#: classes/Video.php:250
 msgid "youtube-dl returned an empty URL."
 msgstr "youtube-dl a retourné une URL vide."
 
-#: classes/VideoDownload.php:359
+#: classes/Video.php:361 classes/Video.php:465
+msgid "Can't find avconv or ffmpeg at @path."
+msgstr "Impossible de trouver avconv ou ffmpeg à @path."
+
+#: classes/Video.php:377
+msgid "Invalid start time: @from."
+msgstr "Horodatage de début non-valide&nbsp;: @from."
+
+#: classes/Video.php:384
+msgid "Invalid end time: @to."
+msgstr "Horodatage de fin non-valide&nbsp;: @to."
+
+#: classes/Video.php:430
 msgid "Conversion of playlists is not supported."
 msgstr "Impossible de convertir une playlist."
 
-#: classes/VideoDownload.php:366
+#: classes/Video.php:435 classes/Video.php:578
+msgid "Conversion of M3U8 files is not supported."
+msgstr "La conversion des fichiers M3U8 n'est pas possible."
+
+#: classes/Video.php:437
 msgid "Conversion of DASH segments is not supported."
 msgstr "Impossible de convertir des segments DASH."
 
-#: templates/inc/footer.tpl:14
-msgid "Donate using Liberapay"
-msgstr "Faire un don avec Liberapay"
+#: classes/Video.php:446 classes/Video.php:488 classes/Video.php:525
+#: classes/Video.php:558 classes/Video.php:586
+msgid "Could not open popen stream."
+msgstr "Impossible d'ouvrir le flux popen."
 
-#: classes/VideoDownload.php:302
-msgid "Invalid start time: "
-msgstr "Horodatage de début non-valide :␣"
+#: classes/Video.php:506
+msgid "This video does not have two URLs."
+msgstr "Cette vidéo n'a pas deux URL."
 
-#: classes/VideoDownload.php:309
-msgid "Invalid end time: "
-msgstr "Horodatage de fin non-valide :␣"
+#: controllers/DownloadController.php:215
+msgid "You need to enable remux mode to merge two formats."
+msgstr "Vous devez activer le mode remux pour fusionner deux formats."
 
-#: templates/index.tpl:28
-msgid "From"
-msgstr "À partir de"
+#: controllers/DownloadController.php:255
+msgid "Can't find URL of video."
+msgstr "Impossible de trouver l'URL de la vidéo."
 
-#: templates/index.tpl:29
-msgid "to"
-msgstr "jusqu'à"
+#: controllers/FrontController.php:64
+msgid ""
+"Easily download videos from Youtube, Dailymotion, Vimeo and other websites."
+msgstr ""
+"Téléchargez facilement des vidéos depuis Youtube, Dailymotion, Vimeo et "
+"d'autres sites web."
 
+#: controllers/FrontController.php:110
+msgid ""
+"List of all supported websites from which Alltube Download can extract video "
+"or audio files"
+msgstr ""
+"Liste de tous les sites web depuis lesquels Alltube Download peut extraire "
+"des fichiers vidéo ou audio"
+
+#: controllers/FrontController.php:136
+msgid "Password prompt"
+msgstr "Demande de mot de passe"
+
+#: controllers/FrontController.php:138
+msgid ""
+"You need a password in order to download this video with Alltube Download"
+msgstr ""
+"Vous avez besoin d'un mot de passe pour télécharger cette vidéo avec Alltube "
+"Download"
+
+#: controllers/FrontController.php:169
+msgid "Video download"
+msgstr "Téléchargement d'une vidéo"
+
+#: controllers/FrontController.php:171
+msgid "Download video from @extractor"
+msgstr "Téléchargement d'une vidéo depuis @extractor"
+
+#: controllers/FrontController.php:177
+msgid "Download @title from @extractor"
+msgstr "Téléchargement de @title depuis @extractor"
+
+#: controllers/FrontController.php:253 controllers/FrontController.php:284
+msgid "Error"
+msgstr "Erreur"
+
+#~ msgid ":"
+#~ msgstr " :"
+
+#~ msgid "Based on"
+#~ msgstr "Basé sur"
+
+#~ msgid "Share on Twitter"
+#~ msgstr "Partager sur Twitter"
+
+#~ msgid "Share on Facebook"
+#~ msgstr "Partager sur Facebook"
+
+#~ msgid "Could not open fopen stream."
+#~ msgstr "Impossible d'ouvrir le flux fopen."
+
+#~ msgid "from"
+#~ msgstr "depuis"
diff --git a/i18n/template.pot b/i18n/template.pot
index 6bc0c01..a7d5402 100644
--- a/i18n/template.pot
+++ b/i18n/template.pot
@@ -1,110 +1,49 @@
 msgid ""
 msgstr "Content-Type: text/plain; charset=UTF-8\n"
 
-#: templates/inc/footer.tpl:4
-msgid "Code by"
+#: templates/playlist.tpl:13
+msgid "Videos extracted from @title:"
 msgstr ""
 
-#: templates/inc/footer.tpl:6
-msgid "Design by"
+#: templates/playlist.tpl:38 templates/password.tpl:11 templates/index.tpl:19
+#: templates/info.tpl:98
+msgid "Download"
 msgstr ""
 
-#: templates/inc/footer.tpl:10
-msgid "Get the code"
-msgstr ""
-
-#: templates/inc/footer.tpl:12
-msgid "Based on"
-msgstr ""
-
-#: templates/inc/footer.tpl:14
-msgid "Donate using Liberapay"
-msgstr ""
-
-#: templates/inc/footer.tpl:14
-msgid "Donate"
+#: templates/playlist.tpl:39
+msgid "More options"
 msgstr ""
 
 #: templates/inc/header.tpl:4
 msgid "Switch language"
 msgstr ""
 
-#: templates/inc/header.tpl:21
-msgid "Share on Twitter"
+#: templates/inc/header.tpl:8
+msgid "Set language"
 msgstr ""
 
-#: templates/inc/header.tpl:23
-msgid "Share on Facebook"
+#: templates/inc/footer.tpl:8
+msgid "Code by @dev"
 msgstr ""
 
-#: templates/playlist.tpl:5
-msgid "Videos extracted from"
+#: templates/inc/footer.tpl:16
+msgid "Design by @designer"
 msgstr ""
 
-#: templates/playlist.tpl:7
-msgid ":"
+#: templates/inc/footer.tpl:21
+msgid "Get the code"
 msgstr ""
 
-#: templates/playlist.tpl:26 templates/video.tpl:96 templates/video.tpl:99
-#: templates/password.tpl:10 templates/index.tpl:19
-#: controllers/FrontController.php:315
-msgid "Download"
+#: templates/inc/footer.tpl:29
+msgid "Based on @youtubedl"
 msgstr ""
 
-#: templates/playlist.tpl:27
-msgid "More options"
+#: templates/inc/footer.tpl:33
+msgid "Donate using Liberapay"
 msgstr ""
 
-#: templates/extractors.tpl:4 controllers/FrontController.php:167
-msgid "Supported websites"
-msgstr ""
-
-#: templates/video.tpl:6
-msgid "You are going to download"
-msgstr ""
-
-#: templates/video.tpl:24
-msgid "Available formats:"
-msgstr ""
-
-#: templates/video.tpl:29
-msgid "Generic formats"
-msgstr ""
-
-#: templates/video.tpl:32
-msgid "Best"
-msgstr ""
-
-#: templates/video.tpl:37
-msgid "Remux best video with best audio"
-msgstr ""
-
-#: templates/video.tpl:41
-msgid "Worst"
-msgstr ""
-
-#: templates/video.tpl:44
-msgid "Detailed formats"
-msgstr ""
-
-#: templates/video.tpl:85
-msgid "Convert into a custom format:"
-msgstr ""
-
-#: templates/video.tpl:91
-msgid "with"
-msgstr ""
-
-#: templates/video.tpl:93
-msgid "kbit/s audio"
-msgstr ""
-
-#: templates/error.tpl:5
-msgid "An error occurred"
-msgstr ""
-
-#: templates/error.tpl:6
-msgid "Please check the URL of your video."
+#: templates/inc/footer.tpl:35
+msgid "Donate"
 msgstr ""
 
 #: templates/password.tpl:5
@@ -147,88 +86,159 @@ msgstr ""
 msgid "Bookmarklet"
 msgstr ""
 
-#: classes/VideoDownload.php:117
+#: templates/info.tpl:13
+msgid "You are going to download @title."
+msgstr ""
+
+#: templates/info.tpl:31
+msgid "Available formats:"
+msgstr ""
+
+#: templates/info.tpl:33
+msgid "Generic formats"
+msgstr ""
+
+#: templates/info.tpl:38
+msgid "Detailed formats"
+msgstr ""
+
+#: templates/info.tpl:80
+msgid "Stream the video through the server"
+msgstr ""
+
+#: templates/info.tpl:85
+msgid "Convert into a custom format:"
+msgstr ""
+
+#: templates/info.tpl:86
+msgid "Custom format"
+msgstr ""
+
+#: templates/info.tpl:86
+msgid "Format to convert to"
+msgstr ""
+
+#: templates/info.tpl:91
+msgid "with"
+msgstr ""
+
+#: templates/info.tpl:92
+msgid "Bit rate"
+msgstr ""
+
+#: templates/info.tpl:93
+msgid "Custom bitrate"
+msgstr ""
+
+#: templates/info.tpl:95
+msgid "kbit/s audio"
+msgstr ""
+
+#: templates/error.tpl:5
+msgid "An error occurred"
+msgstr ""
+
+#: templates/error.tpl:6
+msgid "Please check the URL of your video."
+msgstr ""
+
+#: templates/extractors.tpl:4 controllers/FrontController.php:109
+msgid "Supported websites"
+msgstr ""
+
+#: classes/Config.php:158
+msgid "Best"
+msgstr ""
+
+#: classes/Config.php:159
+msgid "Remux best video with best audio"
+msgstr ""
+
+#: classes/Config.php:160
+msgid "Worst"
+msgstr ""
+
+#: classes/Video.php:159
 msgid "Wrong password"
 msgstr ""
 
-#: classes/VideoDownload.php:158
+#: classes/Video.php:250
 msgid "youtube-dl returned an empty URL."
 msgstr ""
 
-#: classes/VideoDownload.php:289 classes/VideoDownload.php:394
-msgid "Can't find avconv or ffmpeg at "
+#: classes/Video.php:361 classes/Video.php:465
+msgid "Can't find avconv or ffmpeg at @path."
 msgstr ""
 
-#: classes/VideoDownload.php:302
-msgid "Invalid start time: "
+#: classes/Video.php:377
+msgid "Invalid start time: @from."
 msgstr ""
 
-#: classes/VideoDownload.php:309
-msgid "Invalid end time: "
+#: classes/Video.php:384
+msgid "Invalid end time: @to."
 msgstr ""
 
-#: classes/VideoDownload.php:359
+#: classes/Video.php:430
 msgid "Conversion of playlists is not supported."
 msgstr ""
 
-#: classes/VideoDownload.php:364 classes/VideoDownload.php:526
+#: classes/Video.php:435 classes/Video.php:578
 msgid "Conversion of M3U8 files is not supported."
 msgstr ""
 
-#: classes/VideoDownload.php:366
+#: classes/Video.php:437
 msgid "Conversion of DASH segments is not supported."
 msgstr ""
 
-#: classes/VideoDownload.php:375 classes/VideoDownload.php:412
-#: classes/VideoDownload.php:445 classes/VideoDownload.php:478
-#: classes/VideoDownload.php:534
+#: classes/Video.php:446 classes/Video.php:488 classes/Video.php:525
+#: classes/Video.php:558 classes/Video.php:586
 msgid "Could not open popen stream."
 msgstr ""
 
-#: classes/VideoDownload.php:502
-msgid "Could not open fopen stream."
+#: classes/Video.php:506
+msgid "This video does not have two URLs."
 msgstr ""
 
-#: controllers/FrontController.php:124
+#: controllers/DownloadController.php:215
+msgid "You need to enable remux mode to merge two formats."
+msgstr ""
+
+#: controllers/DownloadController.php:255
+msgid "Can't find URL of video."
+msgstr ""
+
+#: controllers/FrontController.php:64
 msgid ""
 "Easily download videos from Youtube, Dailymotion, Vimeo and other websites."
 msgstr ""
 
-#: controllers/FrontController.php:168
+#: controllers/FrontController.php:110
 msgid ""
 "List of all supported websites from which Alltube Download can extract video "
 "or audio files"
 msgstr ""
 
-#: controllers/FrontController.php:193
+#: controllers/FrontController.php:136
 msgid "Password prompt"
 msgstr ""
 
-#: controllers/FrontController.php:194
+#: controllers/FrontController.php:138
 msgid ""
 "You need a password in order to download this video with Alltube Download"
 msgstr ""
 
-#: controllers/FrontController.php:311
+#: controllers/FrontController.php:169
 msgid "Video download"
 msgstr ""
 
-#: controllers/FrontController.php:312
-msgid "Download video from "
+#: controllers/FrontController.php:171
+msgid "Download video from @extractor"
 msgstr ""
 
-#: controllers/FrontController.php:315
-msgid "from"
+#: controllers/FrontController.php:177
+msgid "Download @title from @extractor"
 msgstr ""
 
-#: controllers/FrontController.php:378
+#: controllers/FrontController.php:253 controllers/FrontController.php:284
 msgid "Error"
 msgstr ""
-
-#: controllers/FrontController.php:450
-msgid "You need to enable remux mode to merge two formats."
-msgstr ""
-
-#: controllers/FrontController.php:525
-msgid "Can't find URL of video."
-msgstr ""
diff --git a/index.php b/index.php
index 3da84a0..b69d13d 100644
--- a/index.php
+++ b/index.php
@@ -10,6 +10,7 @@ use Alltube\LocaleMiddleware;
 use Alltube\UglyRouter;
 use Alltube\ViewFactory;
 use Slim\App;
+use Symfony\Component\Debug\Debug;
 
 if (isset($_SERVER['REQUEST_URI']) && strpos($_SERVER['REQUEST_URI'], '/index.php') !== false) {
     header('Location: ' . str_ireplace('/index.php', '/', $_SERVER['REQUEST_URI']));
@@ -20,26 +21,44 @@ if (is_file(__DIR__ . '/config/config.yml')) {
     Config::setFile(__DIR__ . '/config/config.yml');
 }
 
+// Create app.
 $app = new App();
 $container = $app->getContainer();
+
+// Load config.
 $config = Config::getInstance();
 if ($config->uglyUrls) {
     $container['router'] = new UglyRouter();
 }
-$container['view'] = ViewFactory::create($container);
+if ($config->debug) {
+    /*
+     We want to enable this as soon as possible,
+     in order to catch errors that are thrown
+     before the Slim error handler is ready.
+     */
+    Debug::enable();
+}
 
+// Locales.
 if (!class_exists('Locale')) {
     die('You need to install the intl extension for PHP.');
 }
-$container['locale'] = new LocaleManager();
+$container['locale'] = LocaleManager::getInstance();
 $app->add(new LocaleMiddleware($container));
 
+// Smarty.
+$container['view'] = ViewFactory::create($container);
+
+// Controllers.
 $frontController = new FrontController($container);
 $jsonController = new JsonController($container);
 $downloadController = new DownloadController($container);
 
+// Error handling.
 $container['errorHandler'] = [$frontController, 'error'];
+$container['phpErrorHandler'] = [$frontController, 'fatalError'];
 
+// Routes.
 $app->get(
     '/',
     [$frontController, 'index']
@@ -59,7 +78,7 @@ $app->any('/video', [$frontController, 'info']);
 
 $app->any(
     '/watch',
-    [$frontController, 'video']
+    [$frontController, 'info']
 );
 
 $app->any(
diff --git a/package.json b/package.json
index ab98e92..77fc381 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "alltube",
   "description": "HTML GUI for youtube-dl",
-  "version": "2.0.5",
+  "version": "2.1.0",
   "author": "Pierre Rudloff",
   "bugs": "https://github.com/Rudloff/alltube/issues",
   "dependencies": {
diff --git a/resources/manifest.json b/resources/manifest.json
index 25aae7f..6f5e6f1 100644
--- a/resources/manifest.json
+++ b/resources/manifest.json
@@ -5,27 +5,27 @@
   "display": "standalone",
   "icons": [
     {
-      "src": "img/favicon.png",
+      "src": "../img/favicon.png",
       "sizes": "32x32",
       "type": "image/png"
     },
     {
-      "src": "img/logo_60.png",
+      "src": "../img/logo_60.png",
       "sizes": "60x60",
       "type": "image/png"
     },
     {
-      "src": "img/logo_90.png",
+      "src": "../img/logo_90.png",
       "sizes": "90x60",
       "type": "image/png"
     },
     {
-      "src": "img/logo_app.png",
+      "src": "../img/logo_app.png",
       "sizes": "243x243",
       "type": "image/png"
     },
     {
-      "src": "img/logo_250.png",
+      "src": "../img/logo_250.png",
       "sizes": "250x250",
       "type": "image/png"
     }
diff --git a/templates/inc/footer.tpl b/templates/inc/footer.tpl
index 88a3ece..dd4ec6f 100644
--- a/templates/inc/footer.tpl
+++ b/templates/inc/footer.tpl
@@ -1,18 +1,40 @@
 </div>
 <footer class="small-font">
     <div class="footer_wrapper">
-     {t}Code by{/t} <a rel="author" target="blank"
-        href="http://rudloff.pro/">Pierre Rudloff</a>
-     &middot; {t}Design by{/t}
-     <a rel="author" target="blank"
-        href="http://olivierhaquette.fr">Olivier Haquette</a>
-     &middot;
-     <a rel="noopener" target="_blank" href="https://github.com/Rudloff/alltube">{t}Get the code{/t}</a>
-     &middot;
-     {t}Based on{/t} <a href="http://rg3.github.io/youtube-dl/">youtube-dl</a>
-     &middot;
-     <a rel="noopener" target="_blank" title="{t}Donate using Liberapay{/t}" href="https://liberapay.com/Rudloff/donate">{t}Donate{/t}</a>
-     </div>
+        {$dev="<a rel='author' target='blank'
+            href='http://rudloff.pro/'>
+            Pierre Rudloff
+        </a>"}
+        {t params=['@dev'=>$dev]}Code by @dev{/t}
+
+        &middot;
+
+        {$designer="<a rel='author' target='blank'
+            href='http://olivierhaquette.fr'>
+            Olivier Haquette
+        </a>"}
+        {t params=['@designer' => $designer]}Design by @designer{/t}
+
+        &middot;
+
+        <a rel="noopener" target="_blank" href="https://github.com/Rudloff/alltube">
+            {t}Get the code{/t}
+        </a>
+
+        &middot;
+
+        {$youtubedl="<a href='http://rg3.github.io/youtube-dl/'>
+            youtube-dl
+        </a>"}
+        {t params=['@youtubedl'=>$youtubedl]}Based on @youtubedl{/t}
+
+        &middot;
+
+        <a rel="noopener" target="_blank" title="{t}Donate using Liberapay{/t}"
+            href="https://liberapay.com/Rudloff/donate">
+            {t}Donate{/t}
+        </a>
+    </div>
 </footer>
 </body>
 </html>
diff --git a/templates/inc/head.tpl b/templates/inc/head.tpl
index c3ee074..ce5febf 100644
--- a/templates/inc/head.tpl
+++ b/templates/inc/head.tpl
@@ -1,4 +1,3 @@
-{locale path="../i18n" domain="Alltube"}
 <!doctype html>
 <html {if isset($locale)}lang="{$locale->getBcp47()}"{/if}>
 <head>
diff --git a/templates/inc/header.tpl b/templates/inc/header.tpl
index 844757e..8a9c569 100644
--- a/templates/inc/header.tpl
+++ b/templates/inc/header.tpl
@@ -2,28 +2,29 @@
     {if isset($supportedLocales) AND count($supportedLocales) > 1}
         <div class="locales small-font">
             <button class="localesBtn small-font" title="{t}Switch language{/t}">
-                {if isset($locale)}
+                {if isset($locale) AND $locale->getCountry()}
                     {$locale->getCountry()->getEmoji()}
                 {else}
-                    Set language
+                    {t}Set language{/t}
                 {/if}
             </button>
             <ul class="supportedLocales">
                 {foreach $supportedLocales as $supportedLocale}
                     {if $supportedLocale != $locale}
-                        <li><a hreflang="{$supportedLocale->getBcp47()}" lang="{$supportedLocale->getBcp47()}" href="{path_for name='locale' data=['locale'=>$supportedLocale->getIso15897()]}">{$supportedLocale->getCountry()->getEmoji()} {$supportedLocale->getFullName()|ucfirst}</a></li>
+                        <li>
+                            <a hreflang="{$supportedLocale->getBcp47()}"
+                                lang="{$supportedLocale->getBcp47()}"
+                                href="{path_for name='locale' data=['locale'=>$supportedLocale->getIso15897()]}">
+                                {if $supportedLocale->getCountry()}
+                                    {$supportedLocale->getCountry()->getEmoji()}
+                                {/if}
+                                {$supportedLocale->getFullName()|ucfirst}
+                            </a>
+                        </li>
                     {/if}
                 {/foreach}
             </ul>
         </div>
     {/if}
-    <div class="social">
-        <a class="twitter" rel="noopener" href="http://twitter.com/home?status={base_url|urlencode}" title="{t}Share on Twitter{/t}" target="_blank" aria-label="{t}Share on Twitter{/t} {t}(opens a new window){/t}">
-            <div class="twittermask"></div>
-        </a>
-        <a class="facebook" rel="noopener" href="https://www.facebook.com/sharer/sharer.php?u={base_url|urlencode}" title="{t}Share on Facebook{/t}" target="_blank" aria-label="{t}Share on Facebook{/t} {t}(opens a new window){/t}">
-            <div class="facebookmask"></div>
-        </a>
-    </div>
 </header>
 <div class="wrapper">
diff --git a/templates/info.tpl b/templates/info.tpl
index 5d1fa68..6a2d5f9 100644
--- a/templates/info.tpl
+++ b/templates/info.tpl
@@ -3,10 +3,12 @@
 <div itemscope itemtype="http://schema.org/VideoObject">
 <main class="main">
 {include file="inc/logo.tpl"}
-<p id="download_intro">{t}You are going to download{/t}<i itemprop="name">
-    <a itemprop="url" id="video_link"
-        href="{$video->webpage_url}">
-{$video->title}</a></i>.
+{$title="<i itemprop='name'>
+    <a itemprop='url' id='video_link'
+        href='{$video->webpage_url}'>
+        {$video->title}</a></i>"}
+<p id="download_intro">
+    {t params=['@title' => $title]}You are going to download @title.{/t}
 </p>
 {if isset($video->thumbnail)}
     <img itemprop="thumbnailUrl" class="thumb" src="{$video->thumbnail}" alt="" />
@@ -20,11 +22,11 @@
 <br/>
 <form action="{path_for name="download"}">
     <input type="hidden" name="url" value="{$video->webpage_url}" />
+    {if $config->uglyUrls}
+        <input type="hidden" name="page" value="download" />
+    {/if}
     {if isset($video->formats) && count($video->formats) > 1}
         <h3><label for="format">{t}Available formats:{/t}</label></h3>
-        {if $config->uglyUrls}
-            <input type="hidden" name="page" value="download" />
-        {/if}
         <select name="format" id="format" class="formats monospace">
             <optgroup label="{t}Generic formats{/t}">
                 {foreach $config->genericFormats as $format => $name}
@@ -70,26 +72,26 @@
                 {/foreach}
             </optgroup>
         </select><br/><br/>
-        {if $config->stream}
-            <input type="checkbox" checked name="stream" id="stream"/>
-            <label for="stream">{t}Stream the video through the server{/t}</label>
-            <br/><br/>
-        {/if}
-        {if $config->convertAdvanced}
-            <input type="checkbox" name="customConvert" id="customConvert"/>
-            <label for="customConvert">{t}Convert into a custom format:{/t}</label>
-            <select title="Custom format" name="customFormat" aria-label="{t}Format to convert to{/t}">
-                {foreach $config->convertAdvancedFormats as $format}
-                    <option>{$format}</option>
-                {/foreach}
-            </select>
-            {t}with{/t}
-            <label for="customBitrate" class="sr-only">{t}Bit rate{/t}</label>
-            <input type="number" value="{$config->audioBitrate}" title="Custom bitrate" class="customBitrate"
-                name="customBitrate" id="customBitrate" aria-describedby="customBitrateUnit" />
-            <span id="customBitrateUnit">{t}kbit/s audio{/t}</span>
-            <br/><br/>
-        {/if}
+    {/if}
+    {if $config->stream}
+        <input type="checkbox" checked name="stream" id="stream"/>
+        <label for="stream">{t}Stream the video through the server{/t}</label>
+        <br/><br/>
+    {/if}
+    {if $config->convertAdvanced}
+        <input type="checkbox" name="customConvert" id="customConvert"/>
+        <label for="customConvert">{t}Convert into a custom format:{/t}</label>
+        <select title="{t}Custom format{/t}" name="customFormat" aria-label="{t}Format to convert to{/t}">
+            {foreach $config->convertAdvancedFormats as $format}
+                <option>{$format}</option>
+            {/foreach}
+        </select>
+        {t}with{/t}
+        <label for="customBitrate" class="sr-only">{t}Bit rate{/t}</label>
+        <input type="number" value="{$config->audioBitrate}" title="{t}Custom bitrate{/t}" class="customBitrate"
+            name="customBitrate" id="customBitrate" aria-describedby="customBitrateUnit" />
+        <span id="customBitrateUnit">{t}kbit/s audio{/t}</span>
+        <br/><br/>
     {/if}
     <input class="downloadBtn" type="submit" value="{t}Download{/t}" /><br/>
 </form>
diff --git a/templates/playlist.tpl b/templates/playlist.tpl
index 4afa662..5804e4b 100644
--- a/templates/playlist.tpl
+++ b/templates/playlist.tpl
@@ -2,10 +2,17 @@
 <div class="wrapper">
 <main class="main">
 {include file="inc/logo.tpl"}
-<p>{t}Videos extracted from{/t} {if isset($video->title)}<i>
-    <a href="{$video->webpage_url}">
-{$video->title}</a></i>{/if}{t}:{/t}
-</p>
+
+{if isset($video->title)}
+    {$title="<i>
+        <a href='{$video->webpage_url}'>
+            {$video->title}</a>
+    </i>"}
+    <p>
+        {t params=['@title'=>$title]}Videos extracted from @title:{/t}
+    </p>
+{/if}
+
 {if $config->stream}
     <a href="{path_for name="download"}?url={$video->webpage_url}" class="downloadBtn">Download everything</a>
 {/if}
diff --git a/tests/BaseTest.php b/tests/BaseTest.php
index 136a553..9a98f50 100644
--- a/tests/BaseTest.php
+++ b/tests/BaseTest.php
@@ -45,4 +45,29 @@ abstract class BaseTest extends TestCase
     {
         Config::destroyInstance();
     }
+
+    /**
+     * Check tests requirements.
+     * @return void
+     */
+    protected function checkRequirements()
+    {
+        parent::checkRequirements();
+
+        $annotations = $this->getAnnotations();
+        $requires = [];
+
+        if (isset($annotations['class']['requires'])) {
+            $requires += $annotations['class']['requires'];
+        }
+        if (isset($annotations['method']['requires'])) {
+            $requires += $annotations['method']['requires'];
+        }
+
+        foreach ($requires as $require) {
+            if ($require == 'download' && getenv('CI')) {
+                $this->markTestSkipped('Do not run tests that download videos on CI.');
+            }
+        }
+    }
 }
diff --git a/tests/ControllerTest.php b/tests/ControllerTest.php
index fa6b02c..c703a7d 100644
--- a/tests/ControllerTest.php
+++ b/tests/ControllerTest.php
@@ -56,8 +56,8 @@ abstract class ControllerTest extends BaseTest
         $this->container = new Container();
         $this->request = Request::createFromEnvironment(Environment::mock());
         $this->response = new Response();
+        $this->container['locale'] = LocaleManager::getInstance();
         $this->container['view'] = ViewFactory::create($this->container, $this->request);
-        $this->container['locale'] = new LocaleManager();
 
         $frontController = new FrontController($this->container);
         $downloadController = new DownloadController($this->container);
diff --git a/tests/ConvertedPlaylistArchiveStreamTest.php b/tests/ConvertedPlaylistArchiveStreamTest.php
index 0c7b3c5..58b826e 100644
--- a/tests/ConvertedPlaylistArchiveStreamTest.php
+++ b/tests/ConvertedPlaylistArchiveStreamTest.php
@@ -11,6 +11,7 @@ use Alltube\Video;
 
 /**
  * Unit tests for the ConvertedPlaylistArchiveStream class.
+ * @requires download
  */
 class ConvertedPlaylistArchiveStreamTest extends StreamTest
 {
diff --git a/tests/DownloadControllerTest.php b/tests/DownloadControllerTest.php
index ada74f7..7bc4d93 100644
--- a/tests/DownloadControllerTest.php
+++ b/tests/DownloadControllerTest.php
@@ -11,6 +11,7 @@ use Alltube\Controller\DownloadController;
 
 /**
  * Unit tests for the FrontController class.
+ * @requires download
  */
 class DownloadControllerTest extends ControllerTest
 {
@@ -79,10 +80,6 @@ class DownloadControllerTest extends ControllerTest
      */
     public function testDownloadWithM3uStream()
     {
-        if (getenv('CI')) {
-            $this->markTestSkipped('Twitter returns a 429 error when the test is ran too many times.');
-        }
-
         Config::setOptions(['stream' => true]);
 
         $this->assertRequestIsOk(
@@ -153,9 +150,6 @@ class DownloadControllerTest extends ControllerTest
      */
     public function testDownloadWithMissingPassword()
     {
-        if (getenv('CI')) {
-            $this->markTestSkipped('Travis is blacklisted by Vimeo.');
-        }
         $this->assertRequestIsRedirect('download', ['url' => 'http://vimeo.com/68375962']);
     }
 
diff --git a/tests/FrontControllerTest.php b/tests/FrontControllerTest.php
index 0d9248b..2904d47 100644
--- a/tests/FrontControllerTest.php
+++ b/tests/FrontControllerTest.php
@@ -108,6 +108,7 @@ class FrontControllerTest extends ControllerTest
      * Test the info() function.
      *
      * @return void
+     * @requires download
      */
     public function testInfo()
     {
@@ -118,6 +119,7 @@ class FrontControllerTest extends ControllerTest
      * Test the info() function with audio conversion.
      *
      * @return void
+     * @requires download
      */
     public function testInfoWithAudio()
     {
@@ -133,12 +135,10 @@ class FrontControllerTest extends ControllerTest
      * Test the info() function with audio conversion from a Vimeo video.
      *
      * @return void
+     * @requires download
      */
     public function testInfoWithVimeoAudio()
     {
-        if (getenv('CI')) {
-            $this->markTestSkipped('Travis is blacklisted by Vimeo.');
-        }
         Config::setOptions(['convert' => true]);
 
         // So we can test the fallback to default format
@@ -149,6 +149,7 @@ class FrontControllerTest extends ControllerTest
      * Test the info() function with audio enabled and an URL that doesn't need to be converted.
      *
      * @return void
+     * @requires download
      */
     public function testInfoWithUnconvertedAudio()
     {
@@ -167,12 +168,10 @@ class FrontControllerTest extends ControllerTest
      * Test the info() function with a password.
      *
      * @return void
+     * @requires download
      */
     public function testInfoWithPassword()
     {
-        if (getenv('CI')) {
-            $this->markTestSkipped('Travis is blacklisted by Vimeo.');
-        }
         $result = $this->controller->info(
             $this->request->withQueryParams(['url' => 'http://vimeo.com/68375962'])
                 ->withParsedBody(['password' => 'youtube-dl']),
@@ -185,12 +184,10 @@ class FrontControllerTest extends ControllerTest
      * Test the info() function with a missing password.
      *
      * @return void
+     * @requires download
      */
     public function testInfoWithMissingPassword()
     {
-        if (getenv('CI')) {
-            $this->markTestSkipped('Travis is blacklisted by Vimeo.');
-        }
         $this->assertRequestIsOk('info', ['url' => 'http://vimeo.com/68375962']);
         $this->assertRequestIsOk('info', ['url' => 'http://vimeo.com/68375962', 'audio' => true]);
     }
@@ -199,6 +196,7 @@ class FrontControllerTest extends ControllerTest
      * Test the info() function with streams enabled.
      *
      * @return void
+     * @requires download
      */
     public function testInfoWithStream()
     {
@@ -215,6 +213,7 @@ class FrontControllerTest extends ControllerTest
      * Test the info() function with a playlist.
      *
      * @return void
+     * @requires download
      */
     public function testInfoWithPlaylist()
     {
diff --git a/tests/JsonControllerTest.php b/tests/JsonControllerTest.php
index 3b5de08..d25f3e6 100644
--- a/tests/JsonControllerTest.php
+++ b/tests/JsonControllerTest.php
@@ -27,6 +27,7 @@ class JsonControllerTest extends ControllerTest
      * Test the json() function.
      *
      * @return void
+     * @requires download
      */
     public function testJson()
     {
@@ -37,6 +38,7 @@ class JsonControllerTest extends ControllerTest
      * Test the json() function with an error.
      *
      * @return void
+     * @requires download
      */
     public function testJsonWithError()
     {
diff --git a/tests/LocaleManagerTest.php b/tests/LocaleManagerTest.php
index 1bbc8a1..1ceb5d8 100644
--- a/tests/LocaleManagerTest.php
+++ b/tests/LocaleManagerTest.php
@@ -27,7 +27,7 @@ class LocaleManagerTest extends BaseTest
     protected function setUp()
     {
         $_SESSION[LocaleManager::class]['locale'] = 'foo_BAR';
-        $this->localeManager = new LocaleManager();
+        $this->localeManager = LocaleManager::getInstance();
     }
 
     /**
@@ -38,6 +38,7 @@ class LocaleManagerTest extends BaseTest
     protected function tearDown()
     {
         $this->localeManager->unsetLocale();
+        LocaleManager::destroyInstance();
     }
 
     /**
@@ -93,6 +94,7 @@ class LocaleManagerTest extends BaseTest
      */
     public function testEnv()
     {
+        putenv('LANG=foo_BAR');
         $this->localeManager->setLocale(new Locale('foo_BAR'));
         $this->assertEquals('foo_BAR', getenv('LANG'));
     }
diff --git a/tests/LocaleMiddlewareTest.php b/tests/LocaleMiddlewareTest.php
index 299e8ca..005e87e 100644
--- a/tests/LocaleMiddlewareTest.php
+++ b/tests/LocaleMiddlewareTest.php
@@ -39,7 +39,7 @@ class LocaleMiddlewareTest extends BaseTest
     protected function setUp()
     {
         $this->container = new Container();
-        $this->container['locale'] = new LocaleManager();
+        $this->container['locale'] = LocaleManager::getInstance();
         $this->middleware = new LocaleMiddleware($this->container);
     }
 
@@ -51,6 +51,7 @@ class LocaleMiddlewareTest extends BaseTest
     protected function tearDown()
     {
         $this->container['locale']->unsetLocale();
+        LocaleManager::destroyInstance();
     }
 
     /**
diff --git a/tests/PlaylistArchiveStreamTest.php b/tests/PlaylistArchiveStreamTest.php
index afefcb2..9c301a3 100644
--- a/tests/PlaylistArchiveStreamTest.php
+++ b/tests/PlaylistArchiveStreamTest.php
@@ -11,6 +11,7 @@ use Alltube\Video;
 
 /**
  * Unit tests for the PlaylistArchiveStream class.
+ * @requires download
  */
 class PlaylistArchiveStreamTest extends StreamTest
 {
diff --git a/tests/VideoTest.php b/tests/VideoTest.php
index bb47062..b19b538 100644
--- a/tests/VideoTest.php
+++ b/tests/VideoTest.php
@@ -11,6 +11,7 @@ use Alltube\Video;
 
 /**
  * Unit tests for the Video class.
+ * @requires download
  */
 class VideoTest extends BaseTest
 {
@@ -58,10 +59,6 @@ class VideoTest extends BaseTest
      */
     public function testgetUrlWithPassword()
     {
-        if (getenv('CI')) {
-            $this->markTestSkipped('Travis is blacklisted by Vimeo.');
-        }
-
         $video = new Video('http://vimeo.com/68375962', 'best', 'youtube-dl');
         foreach ($video->getUrl() as $videoURL) {
             $this->assertContains('vimeocdn.com', $videoURL);
@@ -76,10 +73,6 @@ class VideoTest extends BaseTest
      */
     public function testgetUrlWithMissingPassword()
     {
-        if (getenv('CI')) {
-            $this->markTestSkipped('Travis is blacklisted by Vimeo.');
-        }
-
         $video = new Video('http://vimeo.com/68375962');
         $video->getUrl();
     }
@@ -92,10 +85,6 @@ class VideoTest extends BaseTest
      */
     public function testgetUrlWithWrongPassword()
     {
-        if (getenv('CI')) {
-            $this->markTestSkipped('Travis is blacklisted by Vimeo.');
-        }
-
         $video = new Video('http://vimeo.com/68375962', 'best', 'foo');
         $video->getUrl();
     }
@@ -142,29 +131,19 @@ class VideoTest extends BaseTest
                 'flv',
                 'bbcodspdns.fcod.llnwd.net',
             ],
-            [
-                'http://www.rtl2.de/sendung/grip-das-motormagazin/folge/folge-203-0', 'bestaudio/best',
-                'GRIP_sucht_den_Sommerkonig-folge-203-0',
-                'f4v',
-                'edgefcs.net',
-            ],
             [
                 'https://openload.co/f/kUEfGclsU9o', 'best[protocol^=http]',
                 'skyrim_no-audio_1080.mp4-kUEfGclsU9o',
                 'mp4',
                 'openload.co',
             ],
-        ];
-
-        if (!getenv('CI')) {
-            // Travis is blacklisted by Vimeo.
-            $videos[] = [
+            [
                 'https://vimeo.com/24195442', 'best[protocol^=http]',
                 'Carving_the_Mountains-24195442',
                 'mp4',
                 'vimeocdn.com',
-            ];
-        }
+            ]
+        ];
 
         return $videos;
     }
@@ -193,17 +172,14 @@ class VideoTest extends BaseTest
      */
     public function m3uUrlProvider()
     {
-        $videos = [];
-
-        if (!getenv('CI')) {
-            // Twitter returns a 429 error when the test is ran too many times.
-            $videos[] = [
+        $videos = [
+            [
                 'https://twitter.com/verge/status/813055465324056576/video/1', 'hls-2176',
                 'The_Verge_-_This_tiny_origami_robot_can_self-fold_and_complete_tasks-813055465324056576',
                 'mp4',
                 'video.twimg.com',
-            ];
-        }
+            ]
+        ];
 
         return $videos;
     }
@@ -365,10 +341,6 @@ class VideoTest extends BaseTest
      */
     public function testGetAudioStreamDashError()
     {
-        if (getenv('CI')) {
-            $this->markTestSkipped('Travis is blacklisted by Vimeo.');
-        }
-
         $video = new Video('https://vimeo.com/251997032', 'bestaudio/best');
         $video->getAudioStream();
     }
diff --git a/tests/ViewFactoryTest.php b/tests/ViewFactoryTest.php
index 163eeb1..45286c9 100644
--- a/tests/ViewFactoryTest.php
+++ b/tests/ViewFactoryTest.php
@@ -6,6 +6,7 @@
 
 namespace Alltube\Test;
 
+use Alltube\LocaleManager;
 use Alltube\ViewFactory;
 use Slim\Container;
 use Slim\Http\Environment;
@@ -24,7 +25,9 @@ class ViewFactoryTest extends BaseTest
      */
     public function testCreate()
     {
-        $view = ViewFactory::create(new Container());
+        $container = new Container();
+        $container['locale'] = LocaleManager::getInstance();
+        $view = ViewFactory::create($container);
         $this->assertInstanceOf(Smarty::class, $view);
     }
 
@@ -35,8 +38,10 @@ class ViewFactoryTest extends BaseTest
      */
     public function testCreateWithXForwardedProto()
     {
+        $container = new Container();
+        $container['locale'] = LocaleManager::getInstance();
         $request = Request::createFromEnvironment(Environment::mock());
-        $view = ViewFactory::create(new Container(), $request->withHeader('X-Forwarded-Proto', 'https'));
+        $view = ViewFactory::create($container, $request->withHeader('X-Forwarded-Proto', 'https'));
         $this->assertInstanceOf(Smarty::class, $view);
     }
 }
diff --git a/tests/YoutubeChunkStreamTest.php b/tests/YoutubeChunkStreamTest.php
index cae27c0..a817119 100644
--- a/tests/YoutubeChunkStreamTest.php
+++ b/tests/YoutubeChunkStreamTest.php
@@ -11,6 +11,7 @@ use Alltube\Video;
 
 /**
  * Unit tests for the YoutubeChunkStream class.
+ * @requires download
  */
 class YoutubeChunkStreamTest extends StreamTest
 {
diff --git a/tests/YoutubeStreamTest.php b/tests/YoutubeStreamTest.php
index f855aa8..3bbd325 100644
--- a/tests/YoutubeStreamTest.php
+++ b/tests/YoutubeStreamTest.php
@@ -11,6 +11,7 @@ use Alltube\Video;
 
 /**
  * Unit tests for the YoutubeStream class.
+ * @requires download
  */
 class YoutubeStreamTest extends StreamTest
 {