Here's another case of unbelievably stupid credulity.
A security camera catches an image of a fuzzy blob. Those looking at it can't figure out what it is. Therefore, it's a ghost.
Forget the possibility of internal reflections in either the camera itself or the dome covering the camera. Forget that it "jumps" as it moves up the chair, just as a light source shining on it would. Forget common sense.
Instead, the unknown must be personified. In fact, so much so, that little blob of light gets a name. It moves to a chair so it must be "sitting".
How sad it must be to be so scared of the unknown that the only way to deal with it is through fantasy instead of honesty.