I've had a small amount of experience with this sort of thing, though not with the full blown streaming apps like OBS. For example I've written an Android App that sends video frames from a phone's camera to a remote client. I believe I set it up so that the camera side acts as the server and the client side just issues GET requests, but it's been a while since I looked at the code so I'm not entirely sure. It worked OK for what I wanted but I always hoped to improve it, which I is something I have yet to get around to.

As for your setup I'm wondering why you chose to use a microcontroller on the camera side instead of something more powerful like a RasberryPi. I would think the later would give you more options and I doubt the cost difference would be very significant to the overall project.