Club Drupal

    $thumbnail_url = 'http://img.youtube.com/vi/' . check_plain($parts['v']) . "/maxresdefault.jpg";

    $response = drupal_http_request($thumbnail_url);

      return $thumbnail_url;

    }

    elseif ($response->code == 401) {

      throw new MediaInternetValidationException("Embedding has been disabled for this video.");

    }

    elseif ($response->code == 404) {

      return "http://s.ytimg.com/yts/img/image-hh-404-vflvCykRp.png";

    }

    elseif ($response->code != 200) {

      throw new MediaInternetValidationException("The YouTube video ID is invalid or the video was deleted.");

      $uri = file_stream_wrapper_uri_normalize('youtube://v/' . check_plain($parts['v']));

      $external_url = file_create_url($uri);

      $oembed_url = url('http://www.youtube.com/oembed', array('query' => array('url' => $external_url, 'format' => 'json')));

      $response = drupal_http_request($oembed_url);

      if (!isset($response->error)) {

        $data = drupal_json_decode($response->data);

        return $data['thumbnail_url'];

      }

      else {

        throw new Exception("Error Processing Request. (Error: {$response->code}, {$response->error})");

        return;

      }

    $id = array_pop($parts);

    $local_path = file_default_scheme() . '://media-youtube/' . check_plain($id) . '.jpg';

      // getOriginalThumbnailPath throws an exception if there are any errors

      // when retrieving the original thumbnail from YouTube.

      try {

        $dirname = drupal_dirname($local_path);

        file_prepare_directory($dirname, FILE_CREATE_DIRECTORY | FILE_MODIFY_PERMISSIONS);

        $response = drupal_http_request($this->getOriginalThumbnailPath());

        if (!isset($response->error)) {

          file_unmanaged_save_data($response->data, $local_path, TRUE);

        }

        else {

          @copy($this->getOriginalThumbnailPath(), $local_path);

        }

      catch (Exception $e) {

        // In the event of an endpoint error, use the mime type icon provided

        // by the Media module.

        $file = file_uri_to_object($this->uri);

        $icon_dir = variable_get('media_icon_base_directory', 'public://media-icons') . '/' . variable_get('media_icon_set', 'default');

        $local_path = file_icon_path($file, $icon_dir);

  /**

   * Updates $base_url depending on whether the embed is a video or playlist.

   */

  function setBaseUrl($parameters) {

    if (isset($parameters['l'])) {

      if (!isset($parameters['v'])) {

        $this->base_url = 'http://youtube.com/playlist';

      }

      $parameters['list'] = $parameters['l'];

      unset($parameters['l']);

    }

    return $parameters;

  }

  /**

   * Returns a url in the format "http://www.youtube.com/watch?v=qsPQN4MiTeE".

   *

   * Overrides interpolateUrl() defined in MediaReadOnlyStreamWrapper.

   */

  function interpolateUrl() {

    if ($parameters = $this->get_parameters()) {

      $parameters = $this->setBaseUrl($parameters);

      return $this->base_url . '?' . http_build_query($parameters);

    }

  }