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 ;-)

Rone - So So So

Sergio Mendes Feat. Erykah Badu & will.i.am - That Heat

Sia - Buttons

Sia - The Girl You Lost To Cocaine

Bop (feat. Bev Lee Harling) - Extraterrestrial Creatures Are Stealing You From Me From The Bedroom