Earlier today, I rebooted my PC and after logon I was presented with an Adobe Flash update, which I ran and then forgot about it. This evening whilst catching up on the various highlights (I use the term loosely) of Saturday TV, I noticed my videos regardless of source all had a green bar across the top.
I am not sure what the new version of flash has done to my computer but to resolve the issue I had to disable hardware acceleration.
Right Click on the Video, select Settings
and untick the box.
Select Close and refresh the video.
The green bar has now gone and the picture is clearer too.
Hope this helps.

April 7, 2012 
Worked like a peach thank-you so much!! =D
Perfect! Thanks so much man
thank you for your help
Thank you. I have the same issue
you are awesome i am very frustrated for 3 days now but you help me out thanks a lot
Thank you! I really hate that bar :L
Thanks so much! I thought this was only happening to me. I should have searched it earlier(:
Thanks a lot!
Yea thank you very much! I thought that unnormal view will be forever.
works for me too. thanks
Thanks… Its works for me too…
well it works, but wont it cause another problem, like lack of smoothness in the movie’s movement and such? I did that to solve the problem and ever since I’ve been having the feelings clips move more ‘chunkily’, less smoothly from frame to frame.
thank you. works for me.