Going to build Janus and dependencies from source (which will take some time) as the backports are old. While doing this, @nebulon is working on an update to TURN/STUN to enable API access in CR itself! See: https://git.cloudron.io/cloudron/box/-/issues/710

Just tested again with 3 other people (so four total) and again it worked great, aside from the fact one person couldn't see or hear one other person (odd).