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 ;-)

Silent Servant - Utopian Disaster (End)

Dew Town Mayor Ft. Noël Rasendrason - Érosion

Abstraxion - An Error Occured

Severija - Zu Asche, Zu Staub (Psycho Nikoros) (Pan-Pot Remix)

Zombie Zombie - Livity