Board Thread:Support Requests - Getting Technical/@comment-33230496-20180822201727/@comment-24155515-20180827004253

You can upload a few types of videos via Special:Upload but YouTube videos are special since you're technically just embedding the video player in a file page rather than what I'd consider truly uploading it. They indeed haven't modified that uploader for things like that (though if they did, it might make things a lot easier for more skilled users XP). (And I only linked Special:Upload in case you'd never seen it since I was only answering to that part where you had seemed confused about it earlier before I first posted.)

That particular adder for YouTube/other-supported-embedded-videos is the one I use so I know about its renaming limitations. (The only reason I haven't ever thought about it is because I've only been uploading videos on wikis I admin so if I really needed to rename one... I never thought about it. 0_o)

Sigh. I wish there was a Special:Upload-like link for embedded videos. (Like, an upload page with all the options like license addition and description, etc. DX)

I hope one of the multitude of solutions in this thread works for you! :D