it looks like this person walks quite directly towards the nest camera. Given it was dark they located it very quickly. I think that suggests they knew where to find it - either they’ve seen it before or been told where it was positioned. You don’t see the person scrambling to locate it. They seem to know it’s rough position even with their head pointed down when approaching the door.
Disabling it is another matter however…
i don't think this means anything. it's exactly where you would expect a door camera to be. don't really need prior knowledge to figure that out.
it's also possible it has an indicator light that turns on when it detects movement? i don't know much about nest cameras, and don't know if google will be much help if i don't know the model NG had.