To counter that, imagine police bodycams with embedded AI touching up live-recording so that the police was always right, suspect always did something wrong. If

To counter that, imagine police bodycams with embedded AI touching up live-recording so that the police was always right, suspect always did something wrong. If you build the source device with this touch-up capability, if you are the certificate authority about these, if you are also defining how these recordings would be used in court, then a perfect fake is useful. (None of us see the actual sensor output from our mobile phones) TL;DR In order for a fake to be useful, you have to fake AND be the only reputable source. If other recorders cannot get close enough, then your touched-up "real" video is the only material available.