VIDEO EVIDENCE: North Tower Collapse from Hudson River

This rare and unique video shows the collapse of the North Tower from a boat on the Hudson River. This angle shows a slightly different perspective on the collapse and is especially unique because you can see the entire trade center from the top all the way to the bottom. A few things to note about this video: the collapse begins at 1:44 on the video, at 1:53 (the "free fall speed" of nine seconds) about half the building is clearly still standing, at 2:07 you can see a chunk of the core still standing (it stays perfectly still for a while then falls at 2:14). It seems to me that the collapse isn't completely over until  somewhere around 2:17, though it is hard to tell in all of that smoke. Clearly this collapse took longer than the South Tower's. This seems to make sense to me, as the North Tower was damaged higher up on the building and the initial failure occurred around 150 feet higher.