The issue raised during the clip in question is about freefall speed during the “collapses.” Concerning WTC Building 7, it’s an open-and-shut case! (see the911forum, for example) Regarding the towers, the point remains valid. If you’ve seen the above higher quality videos, you know the explosions tore down the side of the building faster than they should have.
See below entry for a similar angle used within minutes in the same documentary. More…
ZERO: An Investigation of 9/11 #1
YouTube 1, 2 & 3
