As far as I am concerned, this conversation is about different points of view. JFK appears to have already passed by the monument from Tina Towner’s camera’s point of view. However, the overhead view shows that JFK has not yet reached the tall monument. The overhead view also shows that Tina’s camera’s field of view (yellow cone) has already panned past the tall monument; which explains why her point of view is different than the overhead point of view. This isn’t some mysterious phenomenon or rocket science. I think most folks can understand this concept.
"Overhead View"? What specific "Overhead View" are you claiming shows JFK has, "...not yet reached the tall monument"? Are you referring to the Mark Tyler ANIMATION? If this is the case, you are choosing a cartoon illustrating the "opinion" of 1 person vs the actual filming of the JFK Limo by Tina Towner on 11/22/63. You do understand this, correct?