Does there exist a YouTube proxy server?

I am starting to detangle myself from Google and one of the services I use is YouTube.

I learned that piped exists the other day but that is just a front end for Google.

Is there a tool that I can host on my server that will let me give it YouTube links, that will then download/stream to my server and then server to my phone or computer?

I guess I am looking for a tool that will cache my YouTube videos locally and even download my subscriptions when they upload new stuff.

I'm not sure what this buys me that Piped does not, except that I am backing up videos in case they are removed.