I create "convincing" manipulated images and videos -- but quality may not matter much

I'm part of a larger U.S. government project that is working on developing ways to detect images and videos that have been manipulated. My team's work, though, is to play the role of the bad guy. We develop increasingly devious, and convincing, ways to generate fakes -- in hopes of giving other researchers a good challenge when they're testing their detection methods. For the past three years, we've been having a bit of fun dreaming up new ways to try to change the meaning of images and video. We've created some scenarios ourselves, but we've also had plenty of inspiration from current events and circumstances of actual bad guys trying to twist public opinion.