So that guy had to have a bank account and registered a business under his name in order to be able to use the card terminal and get the payments from it. And for it to work with higher amounts he had to steal the PIN of the victim.
He says criminals would use money mules to get around the first problem, but it's hard for me to say how easy / fool-proof that actually is. He also portrays stealing a PIN as relatively easy, and here also I would definitely not say that it is not possible, but not a completely trivial hurdle either.
I don't think there's a huge structural problem with contactless payment via cards. That said, they do have problems and the bank employees giving out wrong information about how the system works doesn't help. His recommendations are also very thoughtful and personally I keep all my cards encased in metal when I don't use them or just don't take them with me and use more secure contactless payment via my phone.
Still, I'm not personally convinced that the probability of getting your PIN stolen and your card misused for a transaction in the way that is portrayed in the video is particularly high in comparison to other things. If you call that "playing it down", well, so be it. I will take it seriously if there's any evidence that these things are actually having a sizable effect, and then I'll be glad to change my mind on how bunq should implement user control over it.