That video blows my mind. Two gross of blades per day just is literally, mind boggling. I worked two years with a master jeweler from Izmir Turkey. He was phenomenal in that, every move was calculated, never a wasted motion, never a need to go back and "fix" a boo-boo. The gentleman in the video reminded me of that, no wasted motion. Perfection that can only come from a God-given gift and decades of mastering the craft. 33 years as a bench jeweler, even having acquired a "master" status and yet I know, I'm not there yet.
Amazing and a thing of beauty to watch a true craftsman work. Art and technique beautifully blended together.