9/11 bad plane video editing?

This footage shows the incoming plane to the south tower, but look at the far right of the south tower. Are those shadows? I cannot find any other 'shadow' anomalies on the towers besides the fireball casting off a other building nearby. Nothing else.
Bad video editing? Check out the 50 views of the south tower video to confirm. It doesn't look right to me.
https://rumble.com/v4emf4x-50-views-of-south-tower-hit-911.html