This could actually be used as them most dangerous weapon known to mankind. If somebody out there decided to make a video of trump declaring war on china, that he had already issued orders to nuke their country and that video went viral and china's government saw it before anyone could disclaim it, that would be a real problem for the whole world.
Let's say you wanted somebody else's boyfriend/girlfriend, you make a fake video of one of the couple making out with a different person. They fight and break up, leaving you to swoop in as a shoulder to cry on.
The problem here is not with the technology involved, it is humanity itself that is the issue. Guns do not shoot people, a person using the gun shoots another person, people shoot people. The gun is only a tool. The same goes with technology, which is not the problem, it's the user that is abusing the tech that is the problem.
Scott Goerz