I can also confirm that as of a day or two ago, they started uploading a new undetected stream protection on Youtube.
Here are a couple examples.
https://www.youtube.com/watch?v=RjXXSsVNncQ
https://www.youtube.com/watch?v=7jtMbtq8wT0
In my case, I couldn't find anything relating to rtmp or any other protocol I recognized through Wireshark.