I’ve mostly used kdenlive and have had a pretty positive experience, +1 from me
It’s hard to tell at this point, in my opinion we need more active general communities before becoming too specific. It’s been a little overwhelming seeing the fragmentation of communities across instances here on Lemmy. Hopefully something happens to improve the experience, I’m liking being involved so far though!
Any of the Lego games are pretty awesome for local co-op.
I’d also recommend Castle Crashers, it’s a hack and slash / beat 'em up style game that supports up to 4 players locally.