A video purporting to show a Pornhub pop-up on CNN’s 'Magic Wall' behind anchor John King went viral on Twitter. 

The video was quickly shown to be fake, having been added to the segment after it had been broadcast. In reality, a clip of King pushing away a graphic on a screen showing vote counts had been edited to suggest he was really pushing away a notification from the pornographic website.

The incident embarassed the anchor and his employer, and demonstrated the ease with which video and other content formats, including live TV, can be manipulated and misconstrued.

Asked on Twitter whether the deepfake was real, King responded, 'Not. Some clown taking time away from lying about something else apparently because they don’t like math.'