Of course they do
Channels lists all sorts of remote control options here: https://getchannels.com/docs/apps/remote-control/
But did you know that game controllers work too? I just stumbled on this after playing around on my AppleTV, was experimenting with the Xbox One and PS4 controllers for some games. Once paired, they work in the Channels app too! I was able to navigate the whole app, choose channels to watch, rewind, fast forward, etc. At least all of the basics were covered. This might not be suitable for everybody, but some folks out there might love this, so I figured I'd share. Or maybe it's just another convenient button you'll be glad you can quickly pause from? Either way I think it's cool, yet another nice showing from this impeccable software and its awesome development team!