Ask HN: How would you design a streaming service like this?

I'm a fullstack developer and would like to learn how to build a streaming service in depth. What I want to create is essentially twitch clone but not really. I want to create a tutoring app where tutor and students would broadcast video. So 1 tutor 10 students in a video chat.

This video chat needs to be recorded as well.

I can get one-on-one video chat work more or less using webrtc + TURN servers. But no way to record it.

Ideally this would be great:

- all users connect to each other using webrtc

- video also gets recorded and saved in S3.

- without anything touching the server.

If not possible, then it has to be the server...

from what i understand about the server is that you..

- take the incoming stream (usually using a software? can't use webrtc to server for this?)

- save it in storage and also broadcast it to others.

- complexity comes in with transcoding and stuff.

all links, suggestions, questions and advises appreciated.