The one I watch over and over again is Classic Racer Experience, a Duke video featuring Team Obsolete. The first half is interviews, and was watched once. The second half is a practice lap around the Isle of Man with a camera on a Matchless G50. Lots of passing, often at considerably higher speeds than the other bikes, with a running commentary by Dave Roper. The speeds are impressive but not overwhelming. And the sound of that big single at 7000 rpm is wonderful. I have to replay it at least once every time I watch it.