Could be the meteor fragmenting as it hit the atmosphere. The smaller chunks would disperse around the large projectile.
That flash was about the same size as our planet. So yeah, thanks Jupiter! You took one for our team.
At first I thought we had perfect symmetry. That’s what made me think it might be an artifact. But after reading your comment, I went back and checked the video and while there are bright spots at 10, 12 and 2 o’clock, the one at 10 doesn’t appear until well after the other two. So, yes, I like your theory most. The object didn’t break up on a previous pass, as Shoemaker-Levy did, but broke up on entry. Going to be interesting to see what kind of bruises it produced. Not much doubt in my mind, it was a really big impact!