Plex DVR recording/setup

I've got a server running out of my house that I use to create virtual machines for many different facets of what I enjoy (IE: A Plex Server, Discord Bot, PiHole, etc...). The server runs Ubuntu and is utilizing QEMU I believe for the the virtualization.

I've got issues getting the adapter (currently using one of those Xbox adapters to plug into an antenna and back into the computer) to relay into the virtual machine. On top of that, I'd LOVE to ditch hulu and these others (sling, PS Vue, etc..) and utilize local live television with a larger antenna on my roof, but I'll worry about that once I've got these technical aspects worked out.

I guess I'm looking for some advice as well as anyone with a similar setup and how you are running yours?