Hi guys/girls,





I installed Yosemite on my iMac (20-inch, Mid 2007) when it was first released and I had no issues whatsoever.





Last night I updated Yosemite to 10.10.1 and now all of a sudden Safari Version 8.0 (10600.1.25.1) won't play any YouTube videos. All I get is a black screen with a little audio clipping.





When using Firefox (v32.1.1) or Chrome (v38.0.2125.122) everything works ok.





Any thoughts?