Only works on one-to-one of which was to be many-to-many, webrtc

Question

I am developing a conference style application (many-to-many) for video calls this style. The code is available on GitHub but I do not have much node.js experience, hence I

Answer 1

RTCPeerConnection is inherently a one-to-one connection between two clients (peers), so if you want to go beyond that you have to get clever.

The simplest step up is creating a mesh, essentially setting up one PeerConnection to each of the other participants, with all of the participants doing the same thing. You're going to hit a wall in client upload speed pretty fast this way though, usually topping out at 3-4 participants, typically based on the participant with the lowest upload speed.

For groups bigger than that you'd probably want some special setup like an MCU or Router solution, where essentially a special server acts as a super-participant that everyone connects to, which then either mixes together a video of everyone (usually with whomever is speaking as a larger video), or forwards everyone's video to everyone (since upload speed is usually the bottleneck).