Mark Vernon filmed the clip during a paranormal investigation in 11th century Wakefield Cathedral.
His video shows what some have said is a black figure floating across the camera screen, to a mixture of high-pitched and clattering sounds.
Mr Vernon said: “I was investigating it for 40 minutes – I caught a ghost/shadow man walking past my camera in broad daylight.
“If you listen carefully when it appears, I do believe he says ‘I’m here’.”
The cathedral is no stranger to ghost sightings, including in 1784, when it was Wakefield Parish Church.
Last August mum Kerry Launders, 30, got a fright after apparently snapping a ghost while visiting Norwich Cathedral with partner Simon Tobb, 31, and her children Millie and Oscar.
When she looked at pictures taken on her mobile phone back home she saw a creepy “phantom bishop” captured on an upper level of the allegedly haunted 11th-century building.
The “apparition” appeared to wear long robes and a tall hat like a bishop.
Ms Launders, from Bury in Greater Manchester, believed it could be one of 12 or so bishops buried in the cathedral.