Err I think your pulling an argument out of your ass...
I suggest you stick with the topic, and that is a friendly warning from your friendly moderator..
i think these kind of words will invite troll. so relax. no body hurt.
as with the video. i can see there's argument about power supply from main. i dont think a flat 100A is needed to glow some steel from the main (primary). fellow ee welders should know this well. the key is in the heavy step down transformer. its the secondary winding thats spitting the hi amp, be it 100, 1000 or 10KA, whatever. the primary (mains) current could be just a fraction of it. thats why the guy didnt give any 2nd thought touching d secondary, because its low volt, how low i dont know.
the thing is, he seems to be an expert in hi-powered transformer. and telling the KV capacitor bad experience in his another video indicated he is alot more expert than me and many of us here about hi-voltage/power stuff. its his childish way of presentation that makes me laugh. some people prefer to take it seriously... and formally
edit: and that hum. thats the real hum, its enough a warning to tell you to stay away.