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 ;-)

Fiona Apple - Across the Universe

Noosa - Walk On By

Laura J Martin & Mike Lindsay - Applecart

Barbara Panther - Unchained

Yona & Pienet Liikkuvat Pilvet - YONA LOVEEE (practising for the next album)