Format 22
YouTube is quietly testing a further improved format, according to The Times. We tipped you off to Format 18 a while back, but now they've bumped it up even further with Format 22. I'm guessing that the same trick (add&fmt=22 to the URL) will work nicely, although the original video will need to have been uploaded in a suitable resolution. Try the sample clip in fullscreen.
19th Nov 2008 - Tumblr