[Feature Request] Can we get greater control over the Extras on movies?

Would it be possible for movie extras to be treated more like actual content? Right now the name is determined by the file, the thumbnail is a random frame which we have no control over, and extras can only be viewed on the movie page itself.

I would like to be able to edit data on extras (Title, Poster, and maybe even give each extra a description?) and I would also like to be able to add extras to playlists to allow for continuous viewing of a movie and it’s extras.

Honestly, the most important part of this request to me is the ability to add extras to playlists, not being able to edit the data/poster is just a minor inconvenience.

Early 2021 clean-up: duplicate