That's not "Torch Cutting" in that vid,....it's metal butchery.

Over 50 years into metal trades, I'm just not real big on grinders.

Few Louisiana pipe fitters are, actually.

GTC

Member, Clan of the Border Rats
-- “Sometimes I wonder whether the world is being run by smart people who are putting us on or by imbeciles who really mean it.”- Mark Twain