The mystery surrounding "Orbs" dates back since the early days of photography.
Orbs are believed by many to be the energy of a soul projected into the sensitive film (for film cameras) and sensory chips in digital cameras. Due to souls being comprised of energy, this allows a soul's energy to be projected in photographs and sometimes on video.
(There is a wealth of info on the internet about Orbs and photography pertaining to accidentally finding spirit in them.)
see more samples of orbs here: