The same way it took social media like reddit a few years of "finding the culprit" / "name and shame" till mods figured out that many times the online mob gets it wrong and so now that is usually not allowed.
But many people will suffer this until laws get passed or it enters into common consciousness that a video is more likely to be fake than it is to be real. Might be more than 5 years though. And unfortunately laws usually only get passed after there's proven damage to some people from it.