Posted on Jalopnik forums yesterday and on the main page today:
"50 Years Sideways"http://www.youtube.com/watch?v=M4C8CNH92Dg
(updated link; thanks Mugami)
A 90-minute history of "special stage" road rallying, featuring lots of vintage race footage and interviews.
You will lose count of the number of times you say "Oh my God they're going flat-out between two walls of people."