GitDuck’s cofounder here. The video tech is pretty simple for now as we are using https://daily.co for that.
Daily was pretty easy to set up. If you have a React app, by following this guide [1] you can have a simple video chat quite quickly (in a matter of few hours).
Happy to answer if you have more specific questions.
[1] https://www.daily.co/blog/building-a-custom-video-chat-app-w...