
The image above is the opening frame of Jimmy Darnell's footage of the immediate aftermath of the JFKA.
I would like to determine, to the second if possible, how long after the headshot this footage started.
One thing that should be visible in this footage is Dave Weigman getting out of the car in front and sprinting towards the concrete pergola on the GK.
The only thing that catches my eye at the moment is a detail off in the distance.
In the crop below, in the red circle are Umbrella Man and Dark Complected Man sat down.
In the yellow circle is the Newman's lying flat on the grass. The reason this is important is that there are no photographers stood around them. This is something that seemed to happen really quickly and it might be possible to use this detail for a timeline:

I've been able to successfully synchronize most of the aftermath footage within a margin of error of +/- 1 or 2 frames (1/24 of a sec) and the minimum time between Zapruder frame 313 and the beginning of Darnell's and Mal Couch's footage is 24 seconds. The work of Dale Myers supports this figure, though I assume most will not believe it simply because of his name, which I find odd.
I find Bart Kamp's claim that Darnell began filming 10 SECONDS after the headshot to be completely hysterical, since my own synchronizations, and Myers' too, have consistently shown it to be impossible for Darnell to have started filming prior to at least 24 seconds after the headshot.
I do not intend to release my synchronizations publicly any time soon because they still lack high quality versions of most footage, and due to certain disagreements I've had before, I am weary of sharing them, but if anyone would like, I can provide copies and/or clips from my synchronizations if necessary.
You're all welcome to disagree with my timing, but I'm not likely to respond, given I don't come on here often, and I find most forums to be rather hostile or mostly unhelpful anyway.
Email me at thejfktheoristmail@gmail.com if needed.