What software did you try and use last year?
Can you try Broadcast Box. If that is still too heavy, what could I do to make it better?
Around last year I was using some custom plugins for OBS, I haven't used Broadcast Box but I can pick it up to try sometime later.
> If that is still too heavy, what could I do to make it better?
I haven't picked it up yet to see whether it's complex enough to really need it but it has the same pain point a few priors did--being yet another service which I must configure via the browser and so it has to run an entire frontend for doing that rather than being able to do config files.
We ended up just doing a discord screen share, which evaded all the tunnelling/transcoding/etc issues which made us give up on WebRTC.