This has been royally pissing me off as of late. If I play embedded YT clips, or on their site....my iMac grinds to a halt. Spinning beach ball, unresponsive....the lot. CPU usage shoots up to 12% as soon as I play a clip (that might not sound like a lot but for an i7 that is)
It's happened since a recent update, not sure which one though.
Any of you guys having this problem?