I seriously doubt that they produce a thousand guns a day using the technology shown in the video. Also, while the guns they produce may function fine, they probably do not have interchangeable parts due to the handmade nature.
It might have been in the American Rifleman, but YEARS ago I read a article on these guys. It told of the Afghans retrieving fired .303 bullets, filing the rifling marks off and reloading them in cases filled with chopped up movie film they raided from some Brit outpost. The writer said the guns weren't that accurate or powerful but they had a spectacular muzzle flash because of the film. He also reported that they got the steel for the rifles from railroad tracks they tore up in their raids. They used some of it to make exact copies of the old .577/.450 Martini-Henry (Khyber Pass Martinis), right down to Victoria's shield on the receiver.