Matthew Creamer writes:If the term Web 2.0 means anything at all to major media companies, it’s that having a potent way to get video content in front of consumers-and pull in a growing pile of ad bucks-will determine the winners from the losers. Last week’s Web 2.0 Summit, probably the highest-profile annual gathering of media and tech bigs, demonstrated that the answer to a single question determines a media company’s worth to Wall Street and advertisers: Does its digital strategy include a way to distribute both copyrighted and user-generated clips? The haves: Google and News Corp. The have-nots: pretty much the rest of ‘em, from Yahoo to the New York Times Co.