Systems and methods for creating and employing software to handle the playback of media, especially video, in browsers that, in addition to or instead of playing the media in the browser, may use second display protocols to instruct a separate display device to play the media. In one implementation, the software may be in the form of a web or other application. In particular, systems and methods are provided that describe ways to clean up bad assets from favorites or recently-viewed lists. In one implementation, systems and methods are provided that use an erroneous asset report from one user to fix other users' associated lists. In another implementation, the systems and methods employ data about defunct services, both local and global, to remove assets from those services from one or more user lists.