Saw this article by Chad Hart last week, where he does some Wireshark debugging to find out if the Amazon "Mayday" help feature is powered by WebRTC. It’s a really good article, and gives an excellent view into the topology of the Mayday system; regarding WebRTC, he determines that “there is a very high probability that this is WebRTC for the video with a lower probability on the audio”
Well, it’s true. We did our own forensics a few months back and determined that Mayday is completely WebRTC-based, using the Chrome WebRTC stack, the G.711 audio codec, and most likely, the VP8 video codec. There are a number of hints in the Wireshark trace that give this away, even though the media is encrypted with SDES-SRTP; we are pretty sure the video is VP8 because the observed packetization exactly matches how WebRTC handles VP8.
Overall Mayday is a great WebRTC app; my only complaint is the use of the G.711 codec results in quite poor-quality audio for a modern app. Here’s hoping Mayday starts using the Opus codec soon!http://webrtchacks.com/mayday-trace/