Actually joking aside, if there were video evidence many people would still not believe it as the explained truth. You only have to look at all the video �evidence� demonstrated so far to realise that the footage can be explained away by naturally occurring phenomena or human intervention. Whilst we have real footage of things like the 911 attacks and 7/7 London bombing, there are millions of people who believe that these are conspiracies orchestrated by internal government bodies. So even with the latest up to date, detailed, unequivocal, evidence, it is unlikely that there would be major hysteria as half the population wouldn�t believe it as fact. However, something like a nuclear attack or natural phenomena (not supernatural) such as a tsunami or a major meteorite hurtling towards earth (a la Armageddon with Bruce Willis) is more likely to disrupt someone enjoying a cup of Earl Grey in the morning.