Trump and Acosta have long have a contentious relationship as the CNN reporter often asks the president questions that seemed created to illicit a reaction from him.
The video appears to be taken from fringe far-right website InfoWars to make it look like Acosta chopped down on the intern's arm.
Sanders' tweet of the edited video, in which she said the White House would "not tolerate the inappropriate behaviour clearly documented in this video", has at least 20,000 retweets and more than 2 million views.
Eventually NBC reporter Peter Alexander took the microphone and defended his fellow reporter, despite him being from a separate network, calling him a "diligent reporter" - which only proved to anger Trump more.
He was later turned away at the White House press centre by secret service officers.
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Better Call Saul executive producers Mark Johnson and Melissa Bernstein are rumored to be involved, too. The previous report noted that production would commence in New Mexico next month.
"It was done in retaliation for his challenging questions at today's press conference", CNN communications said in a statement posted to Twitter. Acosta started his question by quoting a poem etched at the base of the Statue of Liberty and asked whether the government was rigging the system for Great Britain and Australia.
"When you report fake news, which CNN does a lot, you are the enemy of the people", Trump said to Acosta when he protested again.
Acosta responded that Sanders' description of events was "a lie".
A White House staff member reaches for the microphone held by CNN's Jim Acosta during a news conference at the White House in Washington, November 7, 2018.
Mr Trump took the rare step of mocking Republican candidates who kept their distance from him during the campaign because of concerns that his divisive messages on immigration would turn off voters - but lost anyway.
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The employee added that the firm threatened to reduce their severance pay should they resign from their jobs. In the video, which has been deleted, a topless man can be seen standing in the middle of a room.
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When he uses it, he transforms into a stereotypical Indian wearing a loincloth and feather, and he attacks with a flaming torch. The floodgates are closed, it seems, but that doesn't take away the fact that Super Smash Bros . "It means the world".
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There is also the longshot that Bryant goes into New Orleans and brings the same lockeroom issues he had in Dallas. I'm guessing those in the Big Easy aren't going to like this. "Right when I got here, he took me under his wing".