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 ;-)

Clint Mansell & Kronos Quartet - Winter Lux Aeterna (Dubstep Remix)

Aka Aka & Umami - Ich & Du

Ayya Ites - Nuh Mix

Amon Tobin - At the End of the Day

Venus International - Midsommar