When managing the youdeck setup with multiple people it becomes hard to keep track of which contents are used where (and thus find deletable content). I would like each element to point to it's using entities. E.g. I can see in a PDF that it is used in three playlists and that it is shown on one monitor exclusively. Or for a playlist I would see if it is actually being used on some monitor at the moment. This way I can figure out if things are completely stale (and hence also safe to delete) or not.