According to Avaaz, a progressive human rights nonprofit that investigated the video, a video by Joseph R. Biden Jr. that had been deceptively edited to create the appearance of admitting election fraud was posted more than 17 million times on social Media platforms viewed.
The video was an edited clip from an appearance by Democratic presidential candidate Biden on October 24 on Pod Save America. When asked about efforts to strengthen election security, Mr. Biden gave a long answer and discussed the Obama administration's efforts to protect against electoral fraud. He added that he had put together "the largest and most comprehensive electoral fraud organization in the history of American politics."
The deceptively edited video of this part of his testimony – taken out of context to create the impression that Mr Biden supports election fraud – has been shared on dozens of right-wing YouTube channels, Twitter accounts and Facebook pages. On Monday it was not clear who had made the edited video.
A spokesman for Mr Biden's campaign made it clear that, as seen in the full video, he was discussing his electoral fraud prevention efforts.
"We have assembled the most robust and ingenious team in the history of the presidential campaign to tackle voter suppression and tackle electoral fraud, whatever it is," said TJ Ducklo, the campaign's national press secretary.
Social media companies had a random reaction to the video.
Facebook, where the video received hundreds of thousands of views, added a label to some versions of the video warning viewers that there was no context and contained misleading information. Other versions were not labeled, however, and on Monday night it was unclear why.
A post about the video, which had more than 110,000 views on President Trump's son Eric's Facebook page, was labeled. However, a post on the Team Trump Facebook page that was viewed more than 264,000 times was not.
Facebook did not respond to a request for a comment.
Multiple versions of the video shared by President Trump and right-wing figures on YouTube have been viewed more than 800,000 times. Neither of these videos were labeled, and Ivy Choi, a YouTube spokeswoman, said the videos didn't violate YouTube's community guidelines. YouTube also has a fact-checking information panel about search results.
When people searched YouTube for videos with terms like "Joe Biden election fraud," the company featured the original, unedited video before the many edited versions, Ms. Choi said.
On Twitter, where several high profile accounts shared the video, it had more than 8.4 million views and was shared thousands of times by Monday evening. The company checked the video, a Twitter spokesman said.
The video was one of several right-wing reports shared over the weekend attempting to discredit the Biden campaign.
Another video was changed to create the impression that Mr Biden was addressing the wrong state during an election freeze. In the video, he was speaking to a crowd in St. Paul, Minnesota when he said, "Hello, Minnesota!"
In an edited version of the video, the banners behind Mr. Biden were changed to "Tampa, Florida". According to a report from CNN, this video was viewed over a million times on Twitter.