Both of these videos are from network footage from the morning of 9/11, both were apparently taken from helicopters.
This one is taken from northeast (NNE) of the towers:
http://www.youtube.com/watch?v=rXOVFdjon_g&search=wtcThis one is taken from northwest of the towers:
http://www.terrorize.dk/911/wtc2hit8/911.wtc.2.hit.north.1.aviIn the first video, there is a very sharp descent before the turn, in the second video there is little descent before the turn.
In the first video, the plane appears to be coming out of the SW, in the second, the plane appears to be coming more from the west, WSW.
Both videos are timed very similarly, the fireball appears at a similar point in both and lasts a similar amount of time.
How can one plane take two different plane paths?