This is really not new, I've seen claims of how that damage could not have been caused by an boeing airplane way back in 2001. I also would like to point out that the footage released by the Pentagon has missing frames before the explosion, a fact that this video didn't mention.
Did the americans cause the 9/11? No. It was done exactly as it was reported, by those people. Who were brainwashed by Al-Qaida leaders. Who profit from the war and oil industry boosted by the war. It was an arrengement by both sides. "We provide the reason for a war, you provide the war itself".