The White House has shared digitally manipulated footage of a CNN reporter's interaction with an intern, according to an expert consulted by The Telegraph.

The Telegraph asked a video verification expert to analyse the footage, who said it appeared to have been manipulated - you can watch our side-by-side comparison and analysis of the two videos below. All you have to do is sign in or register to watch it.

Sarah Sanders, the White House press secretary, shared C-Span footage of CNN reporter Jim Acosta and a White House intern, accusing him of placing his hands on her and using it as justification to remove Mr Acosta's press credentials.

The footage of C-Span's broadcast had earlier appeared on the Twitter account of Paul Joseph Watson, an editor for the alt-right conspiracy theorist website InfoWars when it was shared by Mrs Sanders.

Experts said that in Mrs Sanders's version, the footage has been frozen for three frames to make the contact with the intern's arm longer and by implication more aggressive.

This is achieved by repeating the frames so fast the human eye cannot detect it.