I'm constantly seeing videos labeled a Viral, when they clearly aren't. A viral video is one that has a product or service being advertised in the video, per the channel description. I don't think things like this count:
Example 1
Example 2
Example 3
Example 4

Is there anyway we can prevent this from happening? I don't want to suggest that the viral channel only be available to stars and up, that would be lame and counter-productive.

How about a pop-up confirmation window that says "Are you sure this falls under the definition of viral?" And goes on to display the definition.
And then after having read the definition, a user can click yes and then it's added to the viral channel.

I just thought it would help.