I was in rural India for a friend's wedding. They set up a giant tent pavilion to use as a dining hall, with fans hanging from the top. This was a ways away from the main house, but there were some power lines nearby so they just got power straight from the grid.
Also, day of the wedding, there was a large sound system for the musicians and priest. All the components were plugged into a power strip, which was powered by a couple loose wires stuffed into an outlet
OK so yeah, that guy doing it if crazy. That has been covered. But that also looks to be at ground level where anyone can walk by and touch it?!?! That seems like a bad idea too
I've legit seen an electrician do similar in a 480V switchgear in the US... used to help with installs of industrial submetering equipment, but rather than waiting for a facility shutdown, we would often install our CTs on live equipment. IIRC he wasn't even wearing arc flash gear...