iOS/AppleTV missing categories and collections

I think it would be great if there were other categories besides films or series. For example, ‘documentary films’ or ‘music videos’. in iOS, this is stored in ‘other videos’. Furthermore I miss the collections on iOS and AppleTV, which I can configure in the WebUI for my documentary films. It would also be great if the folder view showed how many unseen movies there are.

Early 2021 clean-up: mixed bag of duplicates (e.g.
most documentaries can be assigned to either tv-show or movie libraries; there’s a feature suggestion for an own “mixed” type; request for music video library / agent…)
collections are available on Apple TV / iOS clients