The clip appears to show a TV set and film crew watching on as a Jihadi John-like figure stands next to a prisoner kneeling next to him.
The Islamic State (ISIS) beheading videos reviled millions around the world as they watched Jihadi John callously murder innocent civilians in the most barbaric way in the desert.
But this latest video suggests the videos may have been carried out by ACTORS.
The short clip, which has been watched more than 120,000 times, captures a man wearing the same black clothing as Jihadi John does in the official ISIS films.
Another man wearing a red baseball cap, possibly a director, exchanges words with the actor and then moves back behind the cameras.
Other TV crew members stand around the set as the two actors appear to stand in front of a green screen – a production technique used to include special effects in footage.
The film, which lasts just over a minute, then appears to show the tall masked figure address the camera and gesture with a large knife – much in the same way Jihadi John does in the gruesome beheading videos.
He then grabs the prisoner’s head and moves the knife towards his neck before appearing to carry out the beheading.
But he stops a split-second later and moves away before playfully slapping his co-actor’s head.
The video was uploaded to YouTube by user YAC earlier today.
In the video description it claims the videos was obtained from a member of US senator John McCain’s by Russian hacking group Cyber-Berkut on a recent trip to the Ukraine.
Daily Star Online has contacted Senator McCain’s office for comment.
The sickening Islamic State (ISIS) videos showing Jihadi John beheading victims have been condemned throughout the world.
Earlier this year Jihadi John was unmasked as Mohammed Emwazi – a 27-year-old from north London.
He became a global hate figure after he mercilessly beheaded Brits Alan Henning and David Haines.
He fled to Libya after his cover was blown.