Does e2e work with a large group of people video conferencing?
I thought encryption might get pretty expensive if 1080p streaming directly between peers. For a team of 30 people it eats bandwidth quickly. If there's some kind of server (or supernode) transcoding, does transcoding work with e2e?
Yes, you can have e2e encryption videoconferencing with large groups of people - just not using webrtc (unless you do some crazy hacks - mentioned in my other comment).
By definition, a transcoding server or supernode (acting as an MCU - Multipoint Conferencing Unit) would be a MITM, so that wouldnt be e2e encrypted.
A simple way with WebRTC for a small conference, would be to transcode on the origin and provide multiple streams to peers - one for thumbnails, one for higher quality, low bandwidth fallbacks, etc. This doesnt scale well, but it works nicely for small conferences.
I thought encryption might get pretty expensive if 1080p streaming directly between peers. For a team of 30 people it eats bandwidth quickly. If there's some kind of server (or supernode) transcoding, does transcoding work with e2e?