Maybe we should start searching for some clues!
If they can tell you your not seeing what you see in the Zapruder film, they could do the same with any recording or picture. There were numerous other films confiscated 11/22/63, and never used in evidence. There was a video shot of JFK from behind him in the motorcade. The family who took it has it sealed and locked away from the public.
There is a video, and audio recording of Bill Clinton explaining why he didn't go after OBL that Newsmax submitted to the 9/11 commission, and they minimized it's impact so few saw it.
There was a movie produced called ‘The Path To 9/11’, we were told it was inaccurate and that we shouldn't watch it, and the DVD sales not allowed.
Many ppl believe what they're told despite what they see.
Research the recent Bhutto assassination, is a prime example.