The clip shows the moment the cast from British paranormal series Most Haunted are trying to locate a ghost named Cornelius.
They scour the building while shouting his name, hoping for some indication of activity.
Then suddenly, presenter Yvette Fielding is left spooked, claiming she heard footsteps.
She screams and flees the scene, as the camera pans around.
But what is spotted in the background that has got people talking.
“That is a great spot – they are all too concerned about Yvette to notice”
A second look at the footage appears to reveals an eerie white figure following the group as they run away.
It was picked out from season 11 of the show, which aired in 2009, by YouTube channel Disclose Screen.
Since it was shared yesterday, it has already racked up more than 2,500 hits.
And viewers were quick to offer their opinions.
One comment read: “What a great find.”
Another added: “That is a great spot – they are all too concerned about Yvette to notice.”
And a third claimed: “They found Cornelius.”
But others were not as convinced, believing it is actually something in the man’s hand, which looks like a ghost because of the night vision.
A small ‘demon’ child stands in front of a house in the US state of Indiana
It is not the first time we have seen ghastly scenes, though.
Yesterday, a mum spotted something terrifying watching her son riding his bike.
And before that, a girl staying at an ancient hotel caught more on camera than she expected while taking a video of her room.