A technique called deepfake is worrying people. It can create fake news and trick people. The software replaces the face of a talking president or movie star with a user's face. The result is a fake video. People are worried the technology will be used to trick people in elections.

A new deepfake app called Zao has gone viral in China. A Twitter user posted many Zao videos of himself in famous TV and movie scenes. He looks like the main actor in the movies The Hulk, Titanic, and in the TV fantasy drama Game of Thrones. Only people with a Chinese phone number can download the app.