Ask HN: What's the best way to create live stream app like Twitch?

I want to be productive and learn a new stack over the holidays. I have been thinking of creating an app that is something similar to Twitch streaming. The idea is to enable someone to share their screen and camera and instantly offer live stream class. The subscribers will only be viewing the stream and they will have the ability to send messages via chat. I have the chat component finished but now looking into how to make the video streaming component. I have looked into Daily.co, Agora and 100ms but wondering if there are any open source alternates?