safari in youtube hangs my computer
safari in youtube hangs my computer. Only is in safari with youtube, in others web pages safari works fine!!! and the other applications also works fine. and graphics performance is very good and the graphics switching has no problems when i use applications where the high performance is active.
Can you help me???
Regards
MacBook Pro (Retina, 15-inch, Mid 2014), OS X Yosemite (10.10.2)