I have a community-based website and I’d like to add a text and video-chat feature to it. I’d like it to be text-first and video second, so you don’t have to be streaming to be in the room and for the main part, to be text. Everything I find is video-only. I can host the video streaming data myself.
Have you looked into Matrix?
Matrix
It seems extremely convulated and offers far more features than just video-chat?
So like zoom but open source? Jitsi is the first thing that comes to mind.
IRC could work as a backend for text chat, Twitch based their chat system on that and heavily modified things. Jitsi, or Jami support video out of the box. Could probably also roll your own with XMPP and WebRTC
You can try out Peer Calls. It’s a peer-to-peer video and text chat that uses WebRTC, and is very lightweight. You can either use the flagship instance or self-host your own. One of the disadvantages is that text messages are not stored and are lost when the chat room is closed.