diff --git a/classes/Config.php b/classes/Config.php
index 8cd612b..da91bd6 100644
--- a/classes/Config.php
+++ b/classes/Config.php
@@ -24,7 +24,7 @@ class Config
      *
      * @var string
      */
-    public string $youtubedl = 'vendor/yt-dlp/yt-dlp/yt_dlp/__main__.py';
+    public string $youtubedl = '/usr/bin/yt-dlp';
 
     /**
      * python binary path.
@@ -276,7 +276,9 @@ class Config
     public static function fromFile(string $file): Config
     {
         if (is_file($file)) {
-            return new self(Yaml::parse(strval(file_get_contents($file))));
+            $yaml = Yaml::parse(strval(file_get_contents($file)));
+            assert(is_array($yaml));
+            return new self($yaml);
         } else {
             throw new ConfigException("Can't find config file at " . $file);
         }
diff --git a/classes/Controller/DownloadController.php b/classes/Controller/DownloadController.php
index 35400e5..c1b43e0 100644
--- a/classes/Controller/DownloadController.php
+++ b/classes/Controller/DownloadController.php
@@ -278,8 +278,8 @@ class DownloadController extends BaseController
             $videoUrls = $this->video->getUrl();
         } catch (EmptyUrlException $e) {
             /*
-             *            If this happens it is probably a playlist
-             *            so it will either be handled by getStream() or throw an exception anyway.
+            If this happens it is probably a playlist
+            so it will either be handled by getStream() or throw an exception anyway.
              */
             $videoUrls = [];
         }
@@ -327,7 +327,7 @@ class DownloadController extends BaseController
             $process = $this->downloader->getConvertedStream(
                 $this->video,
                 $request->getQueryParam('customBitrate'),
-                                                             $request->getQueryParam('customFormat')
+                $request->getQueryParam('customFormat')
             );
             $response = $response->withBody(new Stream($process));
         }
diff --git a/classes/Controller/FrontController.php b/classes/Controller/FrontController.php
index fa0478b..1534b5c 100644
--- a/classes/Controller/FrontController.php
+++ b/classes/Controller/FrontController.php
@@ -13,6 +13,7 @@ use Alltube\Locale;
 use Alltube\Middleware\CspMiddleware;
 use Exception;
 use Graby\HttpClient\Plugin\ServerSideRequestForgeryProtection\Exception\InvalidURLException;
+use GrumPHP\Util\Str;
 use Slim\Http\StatusCode;
 use Slim\Http\Uri;
 use stdClass;
@@ -44,7 +45,12 @@ class FrontController extends BaseController
     {
         parent::__construct($container);
 
-        $this->view = $this->container->get('view');
+        $view = $this->container->get('view');
+        assert($view instanceof Smarty);
+        $this->view = $view;
+
+        // Plugins
+        $this->view->registerPlugin('modifier', 'filter_var', 'filter_var');
     }
 
     /**
@@ -222,6 +228,28 @@ class FrontController extends BaseController
             }
         }
 
+        /* Fetch the thumbnail, if it exists, and add a data URI to the video object */
+        if (isset($this->video->thumbnail) && $this->video->thumbnail !== '') {
+            /* Fetch the thumbnail */
+            $thumbnailData = file_get_contents($this->video->thumbnail);
+
+            if ($thumbnailData !== false) {
+                $thumbnailData = base64_encode($thumbnailData);
+                /* Guess the mime type */
+                $thumbnailMime = 'image/jpeg';
+
+                if (strpos($this->video->thumbnail, '.png') !== false) {
+                    $thumbnailMime = 'image/png';
+                } elseif (strpos($this->video->thumbnail, '.gif') !== false) {
+                    $thumbnailMime = 'image/gif';
+                } elseif (strpos($this->video->thumbnail, '.webp') !== false) {
+                    $thumbnailMime = 'image/webp';
+                }
+
+                $this->video->thumbnail = 'data:' . $thumbnailMime . ';base64,' . $thumbnailData;
+            }
+        }
+
         $this->view->render(
             $response,
             $template,
@@ -330,7 +358,11 @@ class FrontController extends BaseController
         $response = $cspMiddleware->applyHeader($response);
 
         if ($this->config->debug) {
-            $renderer = new HtmlErrorRenderer(true, null, null, $this->container->get('root_path'));
+            $projectDir = $this->container->get('root_path');
+
+            assert(is_string($projectDir) || is_null($projectDir));
+
+            $renderer = new HtmlErrorRenderer(true, null, null, $projectDir);
             $exception = $renderer->render($error);
 
             $response->getBody()->write($exception->getAsString());
diff --git a/classes/Middleware/CspMiddleware.php b/classes/Middleware/CspMiddleware.php
index 8934e85..3ec5d6a 100644
--- a/classes/Middleware/CspMiddleware.php
+++ b/classes/Middleware/CspMiddleware.php
@@ -45,13 +45,13 @@ class CspMiddleware
             ->addDirective('base-uri', [])
             ->addDirective('frame-ancestors', [])
             ->addSource('form-action', '*')
-            ->addSource('img-src', '*');
+            ->addSource('img-src', '*')
+            ->addSource('img-src', 'data:');
 
         if ($this->config->debug) {
             // So maximebf/debugbar, symfony/debug and symfony/error-handler can work.
             $csp->setDirective('script-src', ['self' => true, 'unsafe-inline' => true])
-                ->setDirective('style-src', ['self' => true, 'unsafe-inline' => true])
-                ->addSource('img-src', 'data:');
+                ->setDirective('style-src', ['self' => true, 'unsafe-inline' => true]);
         }
 
         return $csp->injectCSPHeader($response);