Streaming through html5 with your target application (chat) would be a tricky one.
All I know is that html5 does support access through your webcam through the <input> element and you can play live streams through the <video> element by using either HLS, direct file or if browser supported even RTSP.
Problem is, not all browsers offer such support for streaming protocols for html5…
Oh and there’s websocket as well which you can consider. But then again, you probably have to implement your own streaming protocol on top of that.
So for now… No, we don’t offer such support yet and sorry to say that we don’t have any samples for that.
You might want to consider using other web technologies aside from using a pure html5 implementation.