Hi @Kristian_Ravn, we were all new to streaming at some point so all questions are welcome here!
People capture the video and audio from the browser using the WebRTC protocol and I’ve linked to a blog explaining what it is. So that’s the layer you’re asking about and it works over TCP or UDP to send the video data.
You can use Wowza Streaming Engine to capture WebRTC and deliver it over RTMP. I’m going to be honest, that’s not the most ideal way to use it since RTMP playback has mostly died and has been replaced by HLS to reach more devices. But, it is possible to do for streaming that does require RTMP or secure RTMP which would RTMPS as FB requires. You would just need an SSL certificate for Secure streaming and we offer the free StreamLock SSL cert here:
Here is the doc for WebRTC to RTMP playback: