You don’t need to watch the video. Tom Scott/None of the interview subjects ever point out how fucked this is, but basically the story is rich sadists would put coins in boiling water and then throw them at poor children to watch them endure injury for small amounts of money as a form of entertainment.
A cold penny to the eye could still mean a trip to the hospital, so I don’t see why that matters. Some safety squints don’t seem unreasonable, but anyone who mentioned it was shouted down for ruining everyone’s fun.
Yeah it’s quite dangerous, there is moderate risk of mild injury and very mild risk of serious injury. But everyone participating knows that.