Suppose we hadn't done so; what alternative method of disseminating information might we have used, that would have had within a few orders of magnitude of the same reach?
The implication here is that YouTube enabled the reach it got; whereas in reality the reach was induced because of the faith we put in it. Had we not done so, then whatever alternative method of communication we did put our faith in - like blog posts, or self-hosting videos - would have had the same reach.
