Danish archer and artist Lars Andersen claims to be the fastest archer in the world. He's put up a new video, illustrating the archery techniques he's spent ten years rediscovering and mastering. Watch it in full-screen mode for best results.
You can read more about him in this article, and on his Web site.
I'm not sure how historically accurate his techniques may be. He obviously believes in them, and provides evidence for his claims: but I'm not sure how well they would have worked on a battlefield, where thousands of archers would be massed together (as at the battles of Crécy or Agincourt) or riding together on horseback (as at the battle of Carrhae). Also, how would crossbowmen have fought, compared to archers using traditionally drawn bows? Did the former develop similar techniques?
Nevertheless, regardless of their historical accuracy or otherwise, Andersen's techniques are certainly impressive and entertaining.