I have a Google TV stick. I've turned off auto-play trailers and auto-play previews with sound. The Google TV is in Apps Only mode.
What happens is that after watching a YouTube video, it will go back to the YouTube homescreen. If you let it sit idle for long enough, it will eventually start auto-playing one of the recommended videos as a preview on the homescreen without anyone having selected it.
Is there any way to turn this behavior on the Google TV YouTube app off?
Go to YouTube's settings & turn off "previews with sound"