Quality selector
Some people doesn't have sadly a good Internet connection to follow a high quality stream or want to save their bandwidth with streaming a lower quality. The web page must handle a quality selector that let the user choose its quality between at least source quality, 720p, 480p and 240, and the webrtc connection is automatically recreated. In the backend, the stream must be re-encoded in multiple size, the WebRTC channel takes the good one.