Just as anyone might take photos or video of a president or celebrity visiting their town if they are in your area...if you have ever seen video of the scene, hundreds of people are lining the street, many with cameras. In other words, no mysterious motives.
The motorcade was not being televised at the time. Later, the government found (and later released) the Zapruder film, which shows the assassination.
JFK was shot while in a motorcade in Dallas, Texas.
JFK was the 4th to (SADLY) be assassinated. BUT LEE HARVEY OSWALD DID NOT KILL HIM. HE TRIED BUT BY THE MOVING MOTORCADE AND HIS ANGLE IT WAS IMPOSSIBLE. IT WAS ONE OF THE PEOPLE BEHIND HIM IN THE CAR.
It wasn't "leaked". It was announced.
The Zapruder film.
1. President Kennedy was shot while in a car with his wife, first lady Jaqueline Kennedy; Governor of Texas, John Connally; and Governor Connally's wife, Nellie Connally. 2. Kennedy was assassinated at 12:30p.m. CST on November 22nd 1963 in Dallas, Texas, USA. His motorcade was driving down Elm street when the shots were fired and he was killed. 3. Abraham Zapruder caught the assassination on tape; a silent color film known as the zapruder film. The zapruder film was an integral part of the Warren Comission. Jfk's head "explodes" (the fatal head shot hits him) in frame 313 of the zapruder film.
Abraham Zapruder
Abraham Zapruder recorded the "Zapruder Film" - the most well-known video of the JFK Assassination. He wasn't the only one who happened to be recording the scene in a day when there were no portable cameras, but other films recorded have never been released.
Life
Charles Brehm has: Played Himself (onlooker, with son) in "Zapruder Film of Kennedy Assassination" in 1963. Played Himself (onlooker, with son) in "Bronson Film of Kennedy Motorcade" in 1963. Played Himself - Crouches with Son in "Bell Film of Kennedy Motorcade and Aftermath" in 1963. Played Himself - Onlooker with Son in "Muchmore Film of Kennedy Assassination" in 1963. Played Himself - Witness to Assassination in "Rush to Judgment" in 1967. Played Himself - Zapruder Film in "The Men Who Killed Kennedy" in 1988. Played himself in "The Men Who Killed Kennedy" in 1988. Played Himself - in Zapruder Film in "JFK" in 1991. Played himself in "Image of an Assassination: A New Look at the Zapruder Film" in 1998.
Spectator at parade in Dallas, caught JFK assassination on film.
The Zapruder film. There were several filming made but these have not been released.