Wow, those are all terrible. I'd say #3 is the worst, just because of the complete lack of attention paid by the person (sadist?) who looped it. Abusive comment hidden. (Show it anyway.)
I agree with Christophe- I can't imagine they'd be working with molten lead without masks or without it being in some sort of fume hood. But despite what kind of metal it may be, that's a cook video! Abusive comment hidden. (Show it anyway.)
But despite what kind of metal it may be, that's a cook video!