I watched Godspell a few weeks ago, and it was filmed during the construction of the towers. (One of them was complete, because one of the scenes was on top of the tower with the observation deck).
Anyways, its a different film to watch (film version of a 70's Jesus Freak/Hippy musical) and difficult for many (I had to watch it while my wife was out of town), but I was surprised at the amount of footage that the WTC got.
And yes, thats what netflix will do to you. Almost nothing is not worth watching.