It can play media off pretty much anything. I use it to connect to multiple Plex instances (I have a System :D) and I've added a few local folders along with OneDrive and Dropbox to it.
It has apps for macOS, tvOS iPadOS and iOS that sync between each other.
So in your case you could just use Infuse on Apple TV and connect it to a directory on your Mac, then play stuff directly from that share.
It can play media off pretty much anything. I use it to connect to multiple Plex instances (I have a System :D) and I've added a few local folders along with OneDrive and Dropbox to it.
It has apps for macOS, tvOS iPadOS and iOS that sync between each other.
So in your case you could just use Infuse on Apple TV and connect it to a directory on your Mac, then play stuff directly from that share.