Everything looks/sounds good so far. Seems to just stuck the same as me, see: [Spreed video calls] Black screen / How to set STUN/TURN
Spreed.ME always worked for me with same setup, but never was able to get video calls running through outside local network, thou didn’t try it since longer time. You can compare your results/turnserver+browser console logs and behaviour with the one I posted on linked topic. If it is similar/ the same, we open a topic on github, to directly address it to the developers.