Working here. Older AppleTVs though not the new one.
As an alternative you know there's YT viewer built into the AppleTV, right?
My trick for a long time has been to sign all of my devices into my YT account and when someone sends me something I want to watch on the big screen, just add it to my "Favorites" list in my account.
Makes the stuff super easy to "find" on the AppleTV later. All the new "Favorites" are right at the top of the Favorites list for immediate access with the AppleTV remote.
There's also "Subscribe" of course, to any person's feed you watch regularly. If they're a person allowing YT to "monetize" their stuff with ads, they also get a few cents for you watching it and a little more for subscribers, so I always subscribe if I'm coming back for more of their stuff, or planning on watching things they upload later. Also makes that stuff super easy to find in the menu via the AppleTV remote later too.