I noticed (am I the only one?) at about 7:10 in the video http://www.youtube.com/watch?v=Jr7vSJHkchs just before he fires the first round, he thumbs the hammer back. That means there was already a round in the chamber. That means he was carrying a 1911 with the hammer down on a live round. Not too smart, IMO.
Good grouping with a .45 one handed..
Judging from the high-end finish, and extended mag plate I’d say his 1911 is most likely one of the newer configurations along the lines of a 1991 series 70 or 80 with the firing pin disconnect.
Probably just as safe as any other modern handgun in a similar “condition.”