I think this started right about the time I got the 4.2.2 update. Now when I play youtube videos of asks to play to TV or to add to a queue. I select play and the video plays but the screen is darkened and this logo is on the screen. Any ideas? I don't think I enabled anything and I don't see and options within the app for such a feature. I wondered if it was a chrome cast thing. See attached screen capture. I'm downloading an update now. I assume it's the 4.3 update. Hopefully this is fixed or someone knows what the heck it is.