i'm just looking on multi-point video conference.
I saw you can make it without a MCU : Decentralized multipoint, where each point calls the others to send/receive audio/video.
But, with a MCU, audio is receied, mixed an send to all participant, but does it work for video ? Each client sends Video to MCU, and MCU re-stream to others ? If yes, what is the channel used for that ? One channel per stream ? If not, how does it work ? Does some MCu aggregate multiple video and restream one ?