Not just new videos. It will instantly render all videos from the history of videos as deniable. What can we do now to establish authenticity of POTUS intervie

Not just new videos. It will instantly render all videos from the history of videos as deniable. What can we do now to establish authenticity of POTUS interviews and declarations for example, when the quotes by themselves are often in need of video evidence as they are surprising. How can any public figure be held accountable for what they say now when in a few years it will all be unverifiable. I fear a lunar landing denialists scenario generalized to every piece of news.