Is there a drop in replacement for iTunes to serve video to the Apple TV?

For years I've used iTunes running on my iMac as the media server for my Apple TV. I navigate to Computers on the Apple TV, my library of videos and music shows up from iTunes, I choose something, hit play and it immediately starts playing on the Apple TV.

I've already tried a couple open source solutions.

- owntone does a good job of sharing music, but doesn't support video.

- JellyFin seems somewhat flakey in scanning its media library and it doesn't pause video with my remote. Have to use their Apple TV app to use it at all.

Ideally I don't want to install any new Apple TV apps nor anything on my phone to control things. I want a drop in replacement for iTunes on my iMac so that I can move that iMac on to Linux Mint.

Does something like this exist or has anyone hacked together a solution?