If Youtube videos do not play reload the page, that's a Youtube bug.
Or maybe now, a few years later, it's a new bug ;-)

TOMMY CASH - LEAVE ME ALONE

Nicolas Godin - Orca

Dr. Dre & Snoop Dogg - The Next Episode (Bluegrass Actual Melody Version)

Clockwork Orchestra - The Generator Girls

Flying Lotus - Ready Err Not