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 ;-)

Skalpel - Switch

Orphic Oxtra - Skeletons Having Sex on a Tin Roof

Divné Semená - Moog In Mood

Colin Stetson - Those Who Didn't Run

Colin Stetson - Who the Waves Are Roaring For (Hunted II)