I want my desktop app https://ossia.io https://ossia.io which uses ffmpeg to be able to send & receive video to another computer over internet without having to

I want my desktop app https://ossia.io https://ossia.io which uses ffmpeg to be able to send & receive video to another computer over internet without having to fiddle with opening ports on each other's routers. This combined with a server like vdo.ninja solves that.