The following commentary comes from an independent investor or market observer as part of TheStreet's guest contributor program, which is separate from the company's news coverage.NEW YORK ( Trefis ) -- Google's ( GOOG) YouTube is set to take the next big step in providing video content, possibly leading to upside for the company's display advertising business. The world's largest video site reportedly is on the road to seal deals with well-known personalities and media companies to produce original content. Google competes in the online advertising space with competitors such as Facebook and the now-struggling Internet giants Yahoo! ( YHOO) and AOL ( AOL). We currently have a price estimate near $600 for Google's stock, which is roughly 25% above the current market price.