It's the internet, I can probably find you a link that claims JFK was involved in a love triangle with Ronald Regan and John Wayne. That doesn't make it true and something so ridiculous shouldn't need to be proven false.
Someone on the internet just discover something that was missed by experts that have watched it in better detail than YouTube can offer and has been overlooked by the millions that have watched this footage?
Since a gun being discharged that close to you is hard to miss.
Jackie O kept her mouth shut for over 30 years about who shot her husband.
The 2 people between the driver and JFK did not noticed a firearm being discharged less than 2 feet from their heads/ears.
The secret service agent at the rear of the car never told anyone what he knew.
Everybody near the car, watching the motorcade, didn't hear that gun shot.
Our government is powerful enough, and cooperative enough, to keep this a secret.