If you are acquainted with any sort of real-time meetings that use the internet to communicate – then chances are you have used WebRTC. Google Meet, Discord, Facebook Messenger, GoToMeeting, Amazon Chime, etc., are some of the top video chat apps that make use of WebRTC js.
Source: https://www.apphitect.ae/blog/build-a-peer-to-peer-video-chat-app-with-webrtc-and-nodejs/