Thanks for posting Damien! I'm the author of the post. This project is one of the first I've built on my journey with WebRTC. Would be happy to answer any questions about my experience.
This is neat, but using the built-in or any USB-based webcam is a real limitation to the quality of the captured images. Unless I'm mistaken, there's not a way to hook up a "real" camera to the webRTC interface. (I would love to be mistaken, please tell me how I am)