i5 3570K@3.4GHz. Funny, while idle it was 40% clocked at 3.7 GHz (probably turbo). It seemed too much, so I looked at running processes, and Google Chrome was using 30% of CPU (YouTube was closed). I killed it, but the browser didn't close, and everything within the browser works just fine, I'm writing this answer now. And CPU usage went down to around 7%
//EDIT: Screenshot while playing video: