The word deepfake has been around only for a couple years. It is a combination of “deep learning” – which is a subset of AI that uses neural networks – and “fake.” The result is that it's possible to manipulate videos that still look authentic.
During the past couple weeks, we have seen high-profile examples of this. There was a deepfake of Facebook’s Mark Zuckerberg who seemed to be talking about world domination. Then there was another one of House Speaker Nancy Pelosi, in which it appeared she was slurring her speech (this actually used less sophisticated technology known as “cheapfake”).