Briefly worked in a bank as a teenager, granted that was a long time ago and things may have changed but giving out your PIN number back then was a big no no and made you liable for any fraud, she’s just told everyone and their granny that her parents have compromised their account if any dodgy transactions happen on that account in the future chances are the bank won’t cover it and could use what happened in the bank and her video as evidence that they don’t keep their account safe, I’m sure it literally says on the slip you get with it to keep your pin to yourself and not give anyone your card, she didn’t need the card or the pin to pay money in just the sort code and account number.