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 ;-)

Tree - Universal (ft. Ariel Thiermann)

Tree - Demons (ft. Beat Culture & Lena Kuhn)

Tree - Karma Police

Benjamin Francis Leftwich - Butterfly Culture (JacM Chillstep Remix)

Serge Gainsbourg - Initials B.B.