From
dreamhawk,
interactive kaleidoscopic art. Wiggle the mouse around and click on the image. Hypnotic!
From
ashbet,
the killer tortoise that keeps chasing cats. Awww cute! Ed chases Cats like that, with similar results.
From
heldc,
A primer on copyright and fair use, made out of short clips from Disney movies.
From
divinerose,
Ouchy the Clown (Potentially NSFW), "Your premier provider of ADULT CLOWN SERVICES". I confess I'm afraid of anyone whose services include both Pro-Dom and Meeting Facilitator.
Seen on
[adult swim],
Bible Fight, the probably blasphemous video game where biblical characters duke it out hand to hand and with special powers.
Indirectly from
bruce_schneier,
Al Khyder and Terry Wrist book a flight. Hilarious! Australian comedy/satire team
The Chaser takes on airline security. YouTube has a lot more of their segments and I'm really getting into them. They're incisive and very funny; a bit like The Daily Show with more remote segments and a lot more getting in peoples' faces. Search YouTube for "The Chaser" or "The Chaser's War on Everything".