Why we need to have a Nanny Camera

It just cross on my you tube account when I search about Nanny Camera. Why we want to have a camera its because when ever we are we can see what is happening to our kids at home in the hands of there Nanny. I dont say that all nanny's are bad but we need to protect also our precious kids away from them. When you see this video you can see how brutal this nanny did to the children. We really need a camera at home to secure everything.