While the historic significance of this film is beyond critique, one should also give Herr Zapruder credit for his brilliant cinematography.



First off he picked one of the best spots to get his shot. Given that he suffered from vertigo one should also credit his willingness to sacrifice his own personal well-being in the service of Art. While he wasn't able to get fully above the Stemmoms Freeway sign, one can only do so much with the set one is given.



Second of note is his directorial decision to cut when he realised he'd filmed the motorcade too soon. This meant that virtually all of the assassination would be covered in the 30 second allotment covered by the spring wound camera drive mechanism.



The fact that he was able to keep rolling as all Hell broke loose in Dealey Plaza even has he himself was reacting to the events should've gotten him a press photography award.



It should be noted that Oswald was almost 3x as far away from Zapruder than any proposed second gunman - he was practically right on top of the so-called Grassy Knoll area and within steps of any plausible sniper lair. One would expect that upon hearing an unsuppressed gunshot from right behind and under him, Zapruder would've whipped around to get a shot. That he didn't should say something about the veracity of 'second gunman' claims.



At any rate you can tell that the fatal bullet came from behind by a slight forward head movement in the same moment JFK loses the piano lessons - and I was using footage available at a pro-conspiracy site.