9/11 Eyewitness Segments on Google Video

Really important analyses of the WTC collapses here, here, here, here, here, here, here and and here.

All the other linked 9/11 Eyewitness videos are worth looking at as well (although I personally find the narrator's voice a bit annoying, I don't know about anyone else).

Also, Hybrideb has many long segments of "9/11 Eyewitness" in the AVI video format.