Jake,
This is a side by side of the same Zapruder film frame, obviously from two different sources.
The one on the left is from the Geraldo.com video (Your source), the one on the right is from the National Archives copy.
As you can see, there is a stark difference in the quality. The NA copy is much brighter, clearer, so I ask you:
Why do you use the worst copy you can find to present your argument?