This year ABC7NY published some video that seemed new to me.
The video starts familiarly, with Dr Mark Heath, who got caught up in the WTC1 collapse, and then helped people. But from around 6:20 I don't remember seeing this footage, at least not in this quality.
The top photo I extracted from short bottom to top-pan of WTC at 8:40, then the cameraman zooms in, and pans down, providing a detailed look at the damage to the SW corner, looking at the West face.
I was able to take a perspective correct crop of this:
Some of the distortion there is due to the camera warping, but you can see the corner gouge goes three windows deep.