For the last couple of weeks, I've started having odd problems with YouTube videos in fullscreen mode.
Not always, but more often than not, when I make a video fullscreen I don't see the video, just a black screen. The controls appear as normal, and I can hear the audio, but there's no picture. Sometimes if I mess around with the controls (pausing and unpausing it, selecting a different bitrate, exiting then reentering fullscreen, etc.) I can make the picture appear, but not always.
Today I started getting another odd glitch: sometimes, instead of not showing the video, it will show it in black-and-white instead of color!
As far as I can tell, this only happens with YouTube videos and only in fullscreen. I've had the same thing happen with both Firefox and Chrome, so I don't think it's a browser issue.
I've tried a variety of things - deleting my Flash profile, using the Flash-Aid Firefox extension to install different versions of Flash with different settings - and nothing has helped.
I'm really puzzled, and I haven't found anyone else with this same issue. Any insight would be greatly appreciated.