Edit: I took just a moment too long typing this and Graham beat me to it.
As usual, I'm about to bring the conversation crashing back down to earth.
That black burned-out spot shows up daily when the sun is at an angle to shine directly into the camera lens. It disappears after a few minutes and all is well until dusk, when the camera picks up the glare because the camera is located inside a window and its infrared capability hasn't been turned off.