If you think people are so smart, why should you care if people get banned from Youtube?

Clearly smart people will discover smart videos on any web site they are located on, and there's no reason for anyone to need Youtube to find an audience.

How would one determine whether information is false or not? It's easier to publish disinformation than it is to disprove it, and while some people are clearly better at sifting truth from fiction than others, I suspect everyone has beliefs that are based upon false information.

Moreover, this isn't censorship by the government, but by Google. Why should a private company be made to disseminate disinformation when it doesn't want to? A key part of freedom of speech is the freedom not to speak, and mandating that a company publish information it doesn't want to is surely just as bad as forcing it to censor information it does want to publish.