The Guardian selects the 50 great­est arts videos on YouTube.

YouTube is best known for its off­beat videos that become viral sen­sa­tions. But among its mil­lions of clips is a trea­sure trove of rare and fas­ci­nat­ing arts footage, lov­ingly posted by fans. Ajesh Pata­lay selects 50 of the best — Joy Division’s TV debut, read­ings by Jack Ker­ouac, a Mar­lene Diet­rich screen test, Madonna’s first per­for­mance… and much more.

via Kot­tke