You could do much of that with OBS and its virtual webcam, passed to the web client. It's a minor hassle to set up the first time, and is ready to re-use thereafter.
nope, because if anyone else talks the focus then shifts to them and nobody can see your screenshare. you have to instead use obs' popout preview and screenshare that specific window, which doesn't work if you dont have a second or third monitor due to always needing to be maximized.
