Just for giggles, I gave Youtube TV a try on ATV. The interface is not very “fluid” and not very Apple like. I found it hard to use, and the skimming through a program is not as easy… No jumping forward by 30 seconds… You have to scroll. Yes, you get non-local channels but the interface is just not that great. Channels has a way better interface.
Oh, and do you know that YTTV will replace your recorded shows with on demand which has commercials that you can’t skip! You might as well subscribe to the cheap version of Hulu or watch the network apps.