Precision it is not.

[Cunuckgaucho]

The earlier part is stamping out the blanks and drawing the brass case. Around the 12min mark you see the extractor groove added, the primer being 'made' and pressed in followed by adding powder and of course the all important sealing of the primer. Look at the country of manufacture on the white box towards the end.

 

[Lane]

Considered making stamping dies to try this at home a while back. I remember reading that there were a few annealing steps, perhaps those are only required for longer rifle length brass (I was looking into making rifle length back then)?

It sure was interesting to see all the ropes and foot pedals attached to the machines for comfort and ease of use. Seems like a few of those processes might have been able to utilize a jig to help speed things up; maybe even improve on safety a hair (though safety doesn't seem to be much of a concern in that factory).

Who could forgot that powder drop method?! Just blow it off, and tamp it down with your fingers? Clearly all of the cartridges in the middle got more powder packed in than the ones on the edges of the circle. Wish I knew where to get a box or two of that stuff to pull down and weigh out the powder. I assume a powder dropper or a volumetric scoop would be more consistent than that sprinkle, blow, and tamp method; perhaps even faster.

I have purchased commercial ammo with very messy primer sealant before; but their pen/marker method looked really neat and clean (albeit rather slow).

Found a few other threads commenting about the wide array of labeled manufacturer locations. Makes me wonder how many boxes of ammo I have that weren't really made where the box says they were. 

Thanks for posting the video though; it was equal parts scary and amusing, with a sprinkle of inspiring here and there.