It is based on WebRTC, so the actual video data doesn't pass through a central server. Google Duo uses this same technology. There _is_ a central server but tha

It is based on WebRTC, so the actual video data doesn't pass through a central server. Google Duo uses this same technology. There _is_ a central server but that is just to glue all the handshakes together. The video/audio don't pass through it, it is all peer-to-peer, so scaling is more so on the client application and the available bandwidth. WebRTC dynamically changes the bitrate of the stream depending on connection though, so it should scale nicely. I haven't tried a large conference on meet.jit.si yet though, only 1:1. But if there are performance issues it is likely the client application itself that needs performance tuning.