Video surveillance at work personally makes me feel more safe at work. If something happens, the police have a bigger chance to find the guilty party.

And I know that the only reason it would ever be used against me, is if i do something very very stupid and/or wrong.

As far as i remember, it isn’t mentioned in the first 7 books. It might be mentioned in the curse we don’t like to talk about (the cursed child) and/or in all her ramblings on pottermore or whatever that site was called.