ISTWCMS-7241: add identifier for YouTube playlists

src/EventSubscriber/UwCblRemoteVideoEventSubscriber.php

@@ -69,6 +69,12 @@ class UwCblRemoteVideoEventSubscriber extends UwCblBase implements EventSubscrib
         // Set the type of video to YouTube.
         $remote_video['view']['type'] = 'YouTube';
       }
+      // Check for YouTube playlist.
+      elseif (preg_match($pattern = '/^(https?:\/\/)?(www\.)?(youtube\.com|youtu\.?be)\/(playlist\?list=)([a-zA-Z0-9_-]+)$/', $remote_video['view']['url'])) {
+
+        // Set the type of video to YouTube playlist
+        $remote_video['view']['type'] = 'YouTube playlist';
+      }
       // Check for Vimeo.
       elseif (strrpos($remote_video['view']['url'], 'vimeo')) {