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 ;-)

Aphex Twin - Milkman

Ash Koosha - Biutiful

Zebbler Encanti Experience - Get Psychic (featuring Prismatik and Olivia Dawn)

Isolée - Beau Mot Plage

Rampue - Adagio for Phoenicopterus