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 ;-)

Boo Hiss - Sloppy on Paper

Yoorae - 52-1

Kel Valhaal - Tense Stage

The Tear Garden - The Bomb Bomb Loopapa Tribe Drown Themselves In A Vat Of Marmite

Nordvargr - Sweet Death Triumphant