It seems to work differently for different people. One time I had no watermark, and everyone else had one. Currently I have watermark on both monitors, but not on full screen videos. I can't tell you about gaming, though. I have watermark on both displays too, but not on full screen videos or games. I'm not sure why some people are getting it on videos and games. Yeah, I'm running dual monitors myself so that could have something to do with it. My TV is my primary.