Chopper Craziness in New 2nd Hit Videos

This site-- 911conspiracy.tv-- has the best collection of 2nd hit vids I've seen so far-- quite comprehensive. Lots of obscure 2nd hit vids there, as well as all the famous ones.

Anyway, this video has a chopper in front of the towers as the south tower is hit, a chopper I don't see in any other vid:


This vid doesn't show that chopper but shows one going really fast behind the towers-- again, a chopper that I don't see in any other video:


Compare with e.g.: