What does this do that VLC can't do ?

Looking at the repo I am not sure what this is. OS for TVs? App to watch television channels on a phone?

There's an AUR open-tv package for Arch/Artix/..., and there's even an AUR open-tv-bin version, but I prefer looking at the build recipes if available, and if not using Arch/Artix/... one can read through the PKGBUILD and see how it builds.

Any good source for the channels?

Lets fucking go. The goat delivered on their promise.