Finally! For months, I visited some sites and / or video via the embedded media player in your browser, or pulled it apart and see, and the video suddenly turned green, and the computer, every nerd.
To fix is simple: right-click on your desktop, choose Properties (small window to appear in Display Properties), then Settings and Advanced.
In "Troubleshooting" at one point decrease video acceleration, and then click Apply. Try to see the video turns green, if it happens again, one more point decrease in the accelerated video and even play right.
I had to lower colon, but it worked.