This tutorial is divided in three versions:

• Plain WebRTC (One to One)
• WebRTC using Media Server (Many to Many)
• WebRTC using CPaaS (Many to Many)

Each version lives on its own branch so you can checkout to each one to review them.

git checkout webrtc     // for one to one webrtc tutorial
git checkout kurento    // for webrtc using media server
git checkout tokbox     // for webrtc using CPaaS

As you can see we're using Kurento as media server and Tokbox as CPaaS service.