Skeptics of Google's decision to pay $1.65B for YouTube made two cogent points: (1) YouTube was riddled with copyright violations that would have to be dealt with once it was owned by a deep pocket; (2) The model of letting the users generate content and selling the eyeballs attracted is easily replicated, and people are fickle -- what would keep another site from becoming the next cool thing and taking YouTube's traffic, thus cratering the value of the investment?
As usual, Google seems to have been ahead of the skeptics.
The first question was answered when it became clear that part of the deal was that YouTube/Google was going legit, working out deals with the copyright holders
Now the second question is also getting an answer, as Universal, which entered a deal with Google, is suing Grouper (Sony-owned) and Bolt. The Financial Times says:
These developments will not prevent new sites from arising, but it means that such sites must start with pockets deep enough to engage in the monitoring necessary for compliance. They will also probably be forced to get licensed from the get-go for the inevitable violations
Legal compliance as a barrier to entry! Personally, I love it, because it is so wonderfully entrepreneurial. These developments will also allow content creators to collect more money for their product, thus tending to offset the problems inherent in the selling-eyeballs model. This is good. The world has many ills, but an over-abundance of good creative products is not one of them. So the more money that becomes available to the creative sector, the more creativity we will get. It ain't rocket science.