I think I remember Ernest mentioning at some point that better Peertube integration is on the todo-list, but there's of course more pressing issues out there.
Another related issue is a.gup.pe-groups, which could potentially be cool if implemented well.
There's also ongoing developments to add groups to Mastodon, which will probably set some sort of standard for groups in the Fediverse. It might make sense to wait until this is ready before putting too much work into supporting other types of groups, though at this point it's of course quite a bit of a different issue from Peertube support. :)