How many webrtc sessions are possible?
Up to 300 before you will see video quality deteriorate. But, that is for one standard Engine license and it can al depend on what your system can support as far as bandwidth, CPU and network conditions.
I would email firstname.lastname@example.org to see what your option may be and get a consultation from a sales engineer on how you could support more than 300 with a high-quality stream.
The other option of course is WebRTC ingest and HLS playback that we can scale to as many as you need without problems and the latency is still low…