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Erm, nope!
Anyway, it was this one (I think), but on second watching - once you can filter out the camera movements
Most videos before were not so erratic though. Maybe whoever was playing didn't "get it"- apparently one of the biggest issues (see owen.c93's post above)
Anyway, the idea is you turn your head slightly but keep your eyes fixed on the screen - the movement is not 1:1, so the on-screen pan pitch and roll; up / down, fore / aft and left / right displacement (for 6DOF systems like in GT5, or Freetrack) is exaggerated. It just takes some getting used to - see if you can find some discussion on TrackIR (and similar, free, solutions) since the sim crowd have been using this for years already.