I had a look through some of the comments on the youtube video. They say that machine shop is in Pakistan and the crankshafts are for a Massey Ferguson 240 tractor. I googled the tractor and it does indeed have a 3-cylinder engine with an identical looking crankshaft. It's a 2500cc Diesel that makes 45HP @ 2250rpm, so it's not a highly stressed crank. The labels on the boxes they pack them in at the end of the video indicate that they're exported to Russia. I assume there are assembly plants in Russia building MF240 tractors under licence.
I reckon those guys have some awsome skills to turn out crankshafts in such agricultural conditions with machines that are probably pre-WW2 vintage. Not a digital caliper in sight. All done with jigs, go-no go gauges, etc. Pretty impressive work.
Not too impressed with the skill level of the bricklayer who built the workshop though, or the electrician who wired it up.
There were a couple of processes I wasn't quite sure about. I presume that big cabinet with the orange door and the shafts on a rotating table is a shot blasting machine, but I could be wrong. Also, when the guy test fitted the crank into an engine block, he bolted what looked like a counterweight onto a web at each end of the shaft. I can't quite see the purpose of that.