Launching USA is working great of my Chromecast with Google TV using:
#EXTM3U
#EXTINF:-1 channel-id="nbc" tvg-chno="6000" tvc-guide-stationid="10991",NBC
nbctve://live/usa
However. I can not exit the app and go back to Channels DVR. I go back and get the exit confirmation screen on the USA app. I select Exit. But the app just relaunches the channel. I'm stuck on a loop.
I have to go back to the Google TV homescreen and then settings to force close the USA app.