My code

<?php
        require 'lib/facebook.php';
        $facebook = new Facebook(array(
        'appId' => 'XXXXXXXXXXXXXXXXXX',
          'secret' => 'XXXXXXXXXXXXXXXXXXXXXXXXXX',
        ));

        $user = $facebook->getUser();

        if ($user) {
          try {
            $likes = $facebook->api("/me/likes/333605930105938");
            if( !empty($likes['data']) )
                echo "<iframe width=\"745\" height=\"535\" src=\"http://www.youtube.com/embed/".$donnees['link']."?fs=1&autoplay=1&loop=1\" frameborder=\"0\" allowFullScreen=\"\"></iframe>";
            else
                echo "<iframe width=\"745\" height=\"535\" src=\"scren.php?id=".$donnees['id']."\" frameborder=\"0\" allowFullScreen=\"\"></iframe>";
          } catch (FacebookApiException $e) {
            error_log($e);
            $user = null;
          }

        }
        if ($user) {
          $logoutUrl = $facebook->getLogoutUrl();
        } else {
          $loginUrl = $facebook->getLoginUrl(array(
            'scope' => 'user_likes'
          ));
        }


        ?>