What if both users are on Tor?
That can help a lot. Another idea would be to push some relay software so that people can receive some sats to run it. So, if you want more privacy, you can pay sats for rerouting your traffic. Tor is great, but the latency is unbearable for real-time video communication.
having sats as the basis to use a feature generally wont work as most people dont have them
this is what briar does, using the internet via tor and local networks without