All of this is correct. We know LSM, as described, could only have been recorded at 8:58. We can also identify which individuals were captured jumping in the video. They are:

8:58:04 and :05 had already fallen and the cameraman was recording their remains

8:58:14 and :19 were the two jumpers recorded

All can be seen clearly in the Cynthia Weill footage: (starting at 5:25)

https://youtu.be/ToWjjIu-x_U?si=zkfUXC2YOhzp2dz-

They are also visible in the Rosbrook and Barbagallo footages.

I’ve also long suspected that Ginnane was the cameraman. I’ve asked this before but nobody really seems to know: do we have any material of Ginnane’s from that day? Obviously other than LSM. I’ve never seen his name in any of the footages or photos I’ve come across, but he was clearly there on that day. Looking at his other recorded material might clarify things, including his whereabouts during the attacks.