I’m all in if something like Peertube gets adopted more fully, but given the sheer amount of space YouTube takes up it seems unlikely to be at the stage it is currently with a provider like Google.
For my own usage: I could substitute background noise with music (either through another provider like Spotify or locally hosting the music and streaming it with Jellyfin), and then more long form content could be done with other providers (Netflix, Disney+, or renting from Google lol) or again using DVD’s or locally hosted videos, but it would certainly be a challenge and I’d miss a lot of the content.