Pole Position: The warriors of Formula 1.
Lots of interviews, onboards, behind-the-scenes, as well as some oddball stuff. As you can see from the trailer, it includes footage from other forms of racing such as motorcycles, sprint cars, drag racing, rallying, even tractor pulling. There's Paul Newman running in IMSA with a Datsun 280ZX, Mario Andretti crash landing a snowmobile in Yellowstone and Ken Carter's famous attempt to jump a rocket-powered Lincoln across a river. Be warned, however, that there are also several crashes, some of them very gratuitous.
As a side note, this guy is regularly uploading rare F1 coverages and highlights from the 60s/70s/80s.
Also as another side note, the other documentary mentioned in the trailer and at the start of this one, Speed Fever, is much better, so of course it's not available in english anywhere. It can be found on youtube in italian, czech and japanese, and there's a german dvd on amazon, but no english whatsoever, save for
this 2 min clip.