Kewl video… 'ceptin' one particular shot (the guy with the two pistols… B-A-A-A-D!) … but I saw this one probably a month ago, #1, and, #2, it's been making the rounds pretty widely. This is, as I've noted for more than a decade, after all a reasonably "small community," and material like this propagates quickly and extensively.
Whoever's video it is, it's "out there."