The White House has shared footage posted by an editor of a conspiracy theory website showing Jim Acosta making contact with a Trump aide, in a bid to justify its suspension of the CNN reporter’s press pass.

Mr Acosta “placed his hands on” a female aide trying to retrieve a microphone as the journalist repeatedly questioned the president, press secretary Sarah Huckabee Sanders claimed in a statement posted to Twitter.

The incident occurred during a fiery press conference in which reporters and Mr Trump clashed over his divisive rhetoric in the run-up to the midterms.

Footage showed Mr Acosta attempting to keep the microphone during his questioning of Mr Trump, while the female aide tried three times to grab the microphone from him.

On her final attempt, Mr Acosta’s free hand briefly blocks the aide’s arm, as Mr Trump refuses to answer the reporter’s questions.

Announcing Mr Acosta’s suspension, Ms Sanders said the White House would “never tolerate a reporter placing his hands on a young woman just trying to do her job”.

“As a result of today’s incident, the White House is suspending the hard pass of the reporter involved until further notice,” she wrote on Twitter.

She added: “The question is: did the reporter make contact or not? The video is clear, he did. We stand by our statement.”

Late on Wednesday, Ms Sanders posted partial video footage of the incident, alongside a statement which read: “We stand by our decision to revoke this individual’s hard pass. We will not tolerate the inappropriate behaviour clearly documented in this video.”

The video, which has no audio and is of notably low quality, shows the moment Mr Acosta’s hand blocks the aide’s attempts to grab the microphone. It repeats the moment six times, each time zooming further into the brief moment of contact.

Many social media users accused Ms Sanders of posting footage which sped up the contact to make Mr Acosta’s movement appear more aggressive.

But according to analysis by The Independent, the video instead appears to have been doctored to freeze for three frames the moment before Mr Acosta’s hand pushes down on the aide’s arm.

Ms Sanders’ tweet came exactly two hours after the same video was shared by Paul Joseph Watson, editor-at-large of InfoWars, a far-right conspiracy theory website fronted by Trump-supporter Alex Jones.

Mr Watson denied altering the footage in an interview with Buzzfeed News. He downloaded a gif file posted elsewhere, “zoomed in, saved it again as an mt2 file – then converted it to an mp4 [video file]”, he told the site. He added: “Digitally it’s gonna look a tiny bit different after processing and zooming in, but I did not in any way deliberately ‘speed up’ or ‘distort’ the video.”

Trump attacks CNN's Jim Acosta in angry White House press conference Show all 10 1 /10 Trump attacks CNN's Jim Acosta in angry White House press conference Trump attacks CNN's Jim Acosta in angry White House press conference Donald Trump launched an extraordinary tirade against CNN reporter Jim Acosta during a press conference following the midterm elections Reuters Trump attacks CNN's Jim Acosta in angry White House press conference The US president ordered the journalist to put down his microphone and “just sit down” AFP Trump attacks CNN's Jim Acosta in angry White House press conference The row began following a question about the migrant caravan approaching the US, when Mr Trump was asked by CNN’s Jim Acosta if he thought he had “demonised” migrants by calling the group an “invasion” EPA Trump attacks CNN's Jim Acosta in angry White House press conference “I think you should let me run the country, you run CNN, and if you did it well, your ratings would be much better,” said the President AFP/Getty Trump attacks CNN's Jim Acosta in angry White House press conference After Mr Acosta attempted to follow up his question with a second on Robert Mueller’s Russia probe, Mr Trump added, pointing angrily: “That’s enough. That’s enough. That’s enough. Excuse me, that’s enough.” Mr Trump said he was “not concerned about anything” because the investigation was “a hoax”. Continuing to berate Mr Acosta, he added: “That’s enough. Put down the mic.” As the reporter continued to quiz him, Mr Trump became more agitated and stepped away from the podium. EPA Trump attacks CNN's Jim Acosta in angry White House press conference Returning to the podium, Mr Trump said: “I’ll tell you what, CNN should be ashamed of itself having you working for them. You are a rude, terrible person. You shouldn’t be working for CNN REUTERS Trump attacks CNN's Jim Acosta in angry White House press conference Trump continued: 'The way you treat Sarah Huckabee is horrible and the way you treat other people are horrible. You shouldn’t treat people that way.” She was sitting in the room listening on REUTERS Trump attacks CNN's Jim Acosta in angry White House press conference A second reporter, Peter Alexander, was called on by the president and said: “In Jim’s defence I’ve travelled with him a lot, he’s a diligent reporter.” EPA Trump attacks CNN's Jim Acosta in angry White House press conference Mr Trump cut him off, telling the NBC News journalist that “I’m not a big fan of yours either”, prompting laughter in the room AP Trump attacks CNN's Jim Acosta in angry White House press conference Mr Acosta continued to try to ask questions without his microphone, causing Mr Trump to tell him: “Just sit down, please. When you report fake news – no – when you report fake news, which CNN does, a lot, you are the enemy of the people.” REUTERS

Mr Trump has long feuded with CNN and accused it of peddling “fake news” – the channel is one of his favoured punching bags. During the ill-tempered press conference on Wednesday, he singled out Mr Acosta as “rude”.

He has also threatened to revoke the broadcast licences of outlets whose content he dislikes, and stoked anger against journalists by denouncing them as the “enemy of the people”.

Speaking on CNN to colleague Anderson Cooper, Mr Acosta said: “I was just trying to ask a question of the president. It was obviously a question they didn’t like.

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“I do think this is a test for all of us. I do think they’re trying to shut us down.”

In a statement, CNN said the revocation of Mr Acosta’s credentials “was done in retaliation for his challenging questions at today’s press conference”.