Hi everyone, I just had the same problem and as a youtuber, I wanted to get the problems fixed quickly. This method worked for me. Hopefully it'll work for all and if not, the majority of you. 1. Go to http://www.youtube.com/swf_test.html 2. Right click on the screen. 3. Go to settings. 4. Left-most tab. Unclick the accelerator box. 5. Refresh the page. When I did this, it didn't work but then I cleared my cookies and cache and now it's working perfectly again. Hope I helped! I made an account just so I could post this!