Interesting. I hadn't realized that WebRTC supported more than two clients talking to each other. My Google-fu is failing me, do you know where I can read up on how the topology of 4 connected callers is orchestrated without a central hub (i.e. how Hangouts does it)?

edit: https://www.webrtc-experiment.com/one-to-many-video-broadcas...

Rob from Twilio here - confirming this is an accurate description. Each peer in the conversation has a connection to every other peer.

Is there any chance of scaling WebRTC any better than that?

Absolutely - we have a lot of ambition around where we want to take Twilio Video in the future.

This is only the first step.