Read thru this article. explains how businesses of the kind of google thinks in expanding their business.
http://counternotions.com/2008/12/03/411/
The crux of the article is:
Google acquires youtube for a whopping $1.6 billion
MS says thats a stupid move
Now google needs to integrate youtube with profits.
How does google go about it?
2 approaches are explained in this article.

its brilliant