This is a recursing argument, and unresolved...
Ideally you would like to watch a couple behave freely as if the cams would not exist. However, it is not possible, it can't be and we have all sort of issues with people being like caged and watched. People react in different way, some hide and some act as they were thrilled by being spied on, and most find a middle way.
It is a bit more like the show Big Brother that real life.