While Mark Cuban may claim that YouTube.com is a bad investment, some think otherwise. Namely, Google thinks otherwise, to the point where they are considering purchasing the media-sharing site for $1.6 Billion. While it is still in discussion and many things may change, Google could be making a very smart move according to some analysts:

"It's damn cheap for a company that already has a global presence," said Trip Chowdhry, an analyst with the San Francisco-based Global Equities Research. "YouTube's brand identity is no less than Google's and is no less than Coke's."
Obviously the power of YouTube for Google would be in numbers and advertising, as well as service integration. The article mentions Google is willing to take on the legal liability of YouTube that others have harped about, and a company the size of Google would definitely have the capacity to do such.