What you're describing is administration, not moderation. Very similar concepts, but there's an absolutely gigantic difference in the feel of a community with active moderation versus a site like YouTube where the overwhelming majority of all user-submitted content is never looked at by a single human with the ability to remove it. Often by design - an SMTP server does not have the same use cases as a forum board, and doesn't need the same kind of hands-on attention that a social service requires to be enjoyable.
In theory channel owners have the ability to handle that for YouTube specifically, but in practice the tools and incentives aren't there to make it actually happen.
In theory channel owners have the ability to handle that for YouTube specifically, but in practice the tools and incentives aren't there to make it actually happen.