[Feature] Create Appendices for Videos

[Myzel394]

Okay so this is something I've never seen before and I'm still missing from big players like YouTube.

Basically, it would be really cool if Creators could append some extra videos / files to videos that belong to the video, but aren't part in it because it's for the people who are more interested in the topic than the usual viewer.

A good example would be an uncut version of an interview. The normal viewer doesn't want to watch the whole interview - they just want to see the most important parts. But if they are interested, they can scroll down a bit and directly watch the full interview with a click (maybe just implement it as a reference to an unlisted video?)