private function get_tags()
 {
     if (isset($this->tags)) {
         return $this->tags;
     } elseif (isset($_GET['tag_ids'])) {
         $this->set_tags(VideoLibrary_DatabaseHelper::get_tags_for_tag_ids($this->get_tag_ids()));
         return $this->tags;
     } else {
         return NULL;
     }
 }
 protected function get_videos_description_div()
 {
     if (isset($_GET['external_video_provider_id'])) {
         $external_video_provider = VideoLibrary_DatabaseHelper::get_external_video_provider_for_id($this->get_external_video_provider_id());
     } else {
         $external_video_provider = NULL;
     }
     if (isset($_GET['tag_ids'])) {
         $tags = VideoLibrary_DatabaseHelper::get_tags_for_tag_ids($this->get_tag_ids());
     } else {
         $tags = NULL;
     }
     if (isset($_GET['q'])) {
         $search_query = $_GET['q'];
     } else {
         $search_query = NULL;
     }
     // if (isset($_GET['external_video_library_id'])) {
     // $external_video_library_id =	$_GET['external_video_library_id'];
     // } else {
     // $external_video_library_id = $this->get_external_video_library_id();
     // }
     return VideoLibrary_DisplayHelper::get_search_page_videos_description_div($tags, $external_video_provider, $this->get_external_video_library_id(), $search_query);
 }