[TASK] Add missing PHPDoc for indexAction

Classes/Controller/YoutubeController.php

@@ -45,6 +45,11 @@ class YoutubeController extends ActionController {
 		$this->youtubeService = $youtubeService;
 	}
 
+	/**
+	 * Renders the Youtube video view
+	 *
+	 * @return void
+	 */
 	public function indexAction() {
 		$id = $this->settings['id'];
 		$maxResults = (string) $this->settings['maxResults'];