This one is nice that it can use any video link, not just YouTube.

That's good, I don't even remember who the dev of live party was, but they've probably left, or it's not being worked on. I think it would be good to have these things done with some sort of longevity in mind. But yeah. I believe the mostr people made and use a cytube clone something called filmswithfriends (but I can't find it now). Ability to make rooms, design layout of the room, add custom emojis, playlists, have Vote Skip on playing next etc etc. I suppose this is why cytube is still around lol