What do you mean by a long time? These OTT live TV services won't tune to a new channel as instantly as cable or satellite in my experience. So if it's taking longer then two or three seconds on average then you might want to see about ensuring you're getting an adequate Wi-Fi signal or try a wired connection. It should take as long as loading a show on Netlix if not a bit faster on YTTV. I guess I've just gotten used to the delay so I don't think about it anymore.