I didn't see any discussion of the target being tracked to the left and continuing to move off the screen after breaking lock.
The report notes the zoom from 1X to 2X at the end of the video, but somehow concludes that there was "rifle shot acceleration" anyway.
Appendix J and K seem the ones that directly address the ATFLIR videos.
I haven't had the time to review it thoroughly but the seem to consider both zoom level changes and the possibility that the object is an aircraft seen from the back (exhaust only) as some have suggested here.
Does it make sense to open a new thread and focus on those two appendixes to try and find flaws in their conclusions?