This is a good idea and will inevitably become reality if YouTube does not come up with a way to organize all it's content by multiple layers (subject, content, region, language). Also, I remember seeing that there was a website like youtube but for racists that were kicked off yt. 3 years ago I'd not have been sure that Google would be really willing to execute it's goal of "organizing all the world's data," but now that we've seen they're willing to compromise in order to penetrate China's market, you can bet they'll be willing to reach an resolution to objectionable content.
Your theory is not entirely out of the question even if the above is true. Google may have acknowledged this. I say this because they have said that youtube will remain youtube while Google video will be a site to organize the content.
Most major networks do have applications online to view their content.