void signal_changed (Property);
std::string video_identifier () const;
void playlist_changed ();
void playlist_content_changed (boost::weak_ptr<Content>, int);
std::string filename_safe_name () const;
void signal_changed (Property);
std::string video_identifier () const;
void playlist_changed ();
void playlist_content_changed (boost::weak_ptr<Content>, int);
std::string filename_safe_name () const;