I have Ubuntu 12.04 and use chrome and watch youtube videos, no problems so far (>3 month). Maybe it's an add on ?
You may want to reinstall chrome.
I think I am going to try this. If this problem goes away I will post it here. May have to give it awhile to see.
My hometown on the Mississippi River.
Using a Asus 3632QM laptop with 8gig RAM, 750gig Hybrid.
Machine Registered 366271, 366273, 366275.
Registered Ubuntu user number 18630. Registered Linux user number 458093.