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 ;-)

DRS - The Puppeteer ft Jubei

Dub Phizix and Strategy - Buffalo Charge

The Bug - Dirty ft. Flowdan

Virus Syndicate - RAG$ (ft Cutline)

Virus Syndicate X Dope D.O.D. - Battle Royal