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 ;-)

Kesi ft. Gilli & Mass Ebdrup - Gadehjørne

Dub Phizix & Skittles - I'm A Creator

Foreign Beggars ft Skinnyman and DVS - Hold on

DJ Vadim - This DJ (Dubstep Ting) featuring JMan

Hint - Watch The Media feat. Profisee