I don't remember if this came from cybersecurity logging practices or from anti-deepfake advice I saw online, but maybe physical cameras can constantly upload video evidence to a reliable third-party server which will save the checksums of, suppose, every minute's worth of data. Then there would be no way for the source of the video to retroactively replace the content on that server with deepfake videography without this leaving evidence in the checksums.

I'm not sure if/how the third-party server would be able to tell that it's listening to a real bodycam/dashcam rather than simply receiving data from a deepfake-generating AI model. I guess to use a video for evidence, you'd have to have corroborating evidence from nearby people who recorded the same event from a different angle (AI-generated videos would have trouble with creating different angles of the same event, right?).

And even if you can't use a video as evidence, witness testimony has always been used in court. Someone else on Lemmy wrote that people have been making arguments in court since before there was photo/video evidence; our justice system (whoever "our" refers to) will simply revert to pre-camera ways when a photo/video cannot be trusted.