Perhaps Scalable WebRTC could help you there? Pure client mesh https://github.com/muaz-khan/WebRTC-Scalable-Broadcast https://github.com/muaz-khan/WebRTC-Scalab

Perhaps Scalable WebRTC could help you there? Pure client mesh https://github.com/muaz-khan/WebRTC-Scalable-Broadcast https://github.com/muaz-khan/WebRTC-Scalable-Broadcast without having to add more servers on your end to mix anything