Content migrate fails when YouTube video not valid

When performing a CCK content_migrate, the valid_id() test of MediaInternetYouTubeHandler object returns false when it encounters an invalid YouTube id. This behavior was likely designed for the UI but during a batch update it stops the migration with a fatal error.

This is what I'm using to get around it:

public function valid_id($id) {
    $url = 'http://gdata.youtube.com/feeds/api/videos/'. $id;
    $response = drupal_http_request($url, array('method' => 'HEAD'));
    if ($response->code != 200) {
      watchdog('video field', "The following YouYube video is invalid: " . $id);
      return TRUE;
//      throw new MediaInternetValidationException(t('The YouTube video ID is invalid or the video was deleted.'));
    }