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 ;-)

Danny Brown - 25 Bucks feat. Purity Ring

Danny Brown - Pneumonia

Tanya Tagaq - Centre ft. Shad

GTA ft. Vince Staples - Little Bit of This

A Tribe Called Red - R.E.D. Featuring Black Bear, Narcy, Yasiin Bey