The original ending of “I Am Legend”

YouTube has the ending of the movie “I Am Legend” [amazon.com, itunes.com] as it was originally planned. Video embedded after the break.
Quoting justRaining63:
This is the way it’s supposed to end. The title “I Am Legend” refers to Neville realizing that the infected are in fact the future of humanity, and that by killing them, though his intentions were pure, he has become the thing of legends, the mythical creature that preys on humans and causes them fear. While the theatrical ending pleased audiences more, this is the ending that Richard Matheson intended and the only one that makes sense with the title.