Mystery at the Maosoleum

A strange black specter is seen hovering next to a maosoleum. Caught on camera, it jolts upwards as if it has been startled. It appears ti have no head and it sort of resembles a cross between an octopus and a mop with stringy whispy tentacles situated at the end of either what looks like thin tails or arms that hang under it. It's shadow can also be seen under it.
I saw this thing on Youtube on a video made by a person that visits cemeteries. My drawing is based on his video when he noticed it, pointed his camera light towards it and it reacted by moving up quickly. But before that, it was "bobbing up and down" as if it were on a lift or elevator.
This caught my eye and has fascinated me ever since. If anybody knows what this paranormal entity is or could be, I'd love to hear from you.