I can't figure out what you mean here. WebRTC's implementation is totally open source. The only thing aside from accounts in Hello is the STUN/TURN servers, and I think OSS projects exist for running those.
In other words, everything is reusable and is being used by tons of new startups and projects doing video conferencing.
The whole thing will even use free codecs if both sides support it.
Meanwhile, we still don't have any FLOSS implementation for WebRTC-based voice+video.