Adobe Flash Player

George, To check if AVG is the culprit try disabling (http://avgclick.me/TempDisableAVG).
AVG Guru

I am using Windows 8.1 and when I try to open a Youtube video I get audio but no video (just a green screen). The lead in ads will play fine but the problem comes when the video content begins. Have tried the recommendations on the Adobe flash player help site but they don't work. Any suggestions? Thanks.

George, To check if AVG is the culprit try disabling (http://avgclick.me/TempDisableAVG).
AVG Guru