Hello there.
I run through 2 routers - a non-VPN router as a base and then a VPN router connected directly to it. My Plex server runs on a Mac Mini connected to the VPN router, and I also have an Apple TV connected to the non-VPN router. I want to be able to stream from Plex to the Apple TV, and have set the Mac Mini to a static IP and configured it for port forwarding (I think - I'm not really an expert to put it mildly), but the Mac Mini and Plex are still invisible on my non-VPN network... Any suggestions would be gratefully appreciated.