https://techcrunch.com/2020/02/04/twitters-policy-on-deepfakes-and-manipulated-media-will-only-remove-harmful-tweets-including-voter-suppression/

Twitter today is announcing the official version of its “deepfake” and manipulated media policy, which largely involves labeling tweets and warning users of manipulated, deceptively altered or fabricated media — not, in most cases, removing them. Tweets containing manipulated or synthetic media will only be removed if they’re likely to cause harm, the company says.

However, Twitter’s definition of “harm” goes beyond physical harm, like threats to a person or group’s physical safety or the risk of mass violence or civil unrest. Also included in the definition of “harm” are any threats to the privacy or the ability of a person or group to freely express themselves or participate in civic events.