Wait, so you say it doesn’t synch with gunfire, then another guy says, “No, it can’t be muzzle fire because it IS synched and wouldn’t be.”
Sorry, looks totally like muzzle flash and not a strobe. I played in a rock band. I know strobes.
https://www.youtube.com/watch?v=gpMrm1xUJ40
At 14:25
Then apologize.
It is a strobe. Stop letting an agenda get in the way of the obvious.