I have the Co-Star GTV box. Be SURE you update YouTube on both the TV/box and your phone/tablet. If you do, as long as the phone and the TV are on the same wireless network (your home network, not a carrier network), it's virtually automatic:
- You do nothing on the TV.
- When you open YouTube on your phone/tablet there is a new tutorial screen. It tells you to activate sending it to your TV by press a rectangular looking box with ">" (like "Play" on a DVD) just at the top center of the screen on your phone. When you do, a menu opens on your phone that gives you the option of playing the media on your phone or "Google TV". You select, done.
It works amazingly and in my opinion just MADE Google TV. I've had my Co-Star for several months and it was "OK", but this is fantastic. It's just so much easier to navigate to the video you want on your phone. Spent the last 2 nights watching vid's and movies this way.
Hope this helps.