Like a lot of things with this case, people here and elsewhere quibble over the minutiae of this case. Does it really matter if the shots occurred at 12:30 and 14 seconds or 12:29 and 58 seconds?
The larger point here is this animation brings home an excellent bird's eye, real-time view as it happened that day that no single photo nor witness statement could ever match. It's important, too, to remember that people were not standing around that day in DP saying "Wait for it! Here it comes! What time is it...?!" Obviously, no one expected it to happen so, therefore, witness statements about the precise timing the shots occurred are going to vary.
Isn't there a photo taken way down on Elm Street where Jack Daniel was that clearly shows the car heading toward the photographer and it shows the clock in the background? I think the clock shows 12:30? And with the car already out of the kill zone, the Z313 shot would have been fired seconds beforehand?
See what I mean? Does it matter? We should be appreciative of what Tyler has done here. It's an amazing piece of work and I've emailed him to ask him to see if he'd be willing to add more features to it. Not quibbles about when the pilot car went by and the precise time down to the millisecond of when the third shot was fired. Further, his animation has already proven, at least for me, and debunked one of the more ridiculous theories of the case - that the Zapruder film, and then the Nix and Muchmore films as well as photos, have been altered or frames have been removed.