Digital Data: how do you distinguish true from fake?

As technology goes more and more towards Artificial Intelligence branches such as Machine Learning and Deep Learning technologies, data and information are getting more and more endangered by Fake News and tampered materials. Deep Fakes seems to be the most "promising" and dangerous example of this kind. Shortly, it allows creating a tampered video content by replace its behavior. Say, like replacing an actor's face with someone's else, as it happened to Gal Gadot (read more). Turns out there are out thousands of "faked" videos out in the network.