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 - Best Grime

Kesi - Mere End Musik

Rednek Feat Stormin - Bag of Ganja

Friction & Skream - Kingpin (ft. Scrufizzer, P Money & Riko Dan)

Dub Phizix and Skeptical feat Strategy - Marka