This a pointless nearly unenforceable rule to make people feel better. Sure, if you generate something that seems like a real event that is provably false you can be caught, but anything mundane is not enforceable. Once models reach something like Sora 1.5 level of ability, we are kind of doomed on knowing whats real in video.
once something sora 1.5 level of ability is there – definitely reverse-sora model which can recognise ai-made videos should be possible to train as well