If the $1 billion Web video advertising market is to reach the level of television's estimated $50 billion, it ironically won't be thanks to YouTube, the Internet's most popular spot for watching clips.

Despite the site's enormous popularity--it's the no. 5 Web site--YouTube has yet to make money from the massive video inventory it produces. Industry insiders have even estimated that it costs Google as much as $1 million a day in bandwidth fees to serve hundreds of millions of videos, according to Fortune.

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