I have a bunch of videos that aren't indexed by metadata providers. I've selected the "Movies" content type to make use of the suggestions feature. Unfortunately it only works for videos following a specific naming scheme (I think it's a date in the title or a dash).
Please consider expanding the suggestions systems for videos that are not movies.
I haven't really found out if manually edited metadata is affected by the suggestions, but in any case it would be really helpful to have a feature that lets you edit metadata of multiple items at the same time.
Also a indicator for which metadata an item has would be useful (maybe just for tags).