Twitter is adding video content to boost ad revenue in a bid to reach $1 billion in sales by 2014. The company has already struck a deal with the NBA to stream game highlights and with ESPN to showcase footage as well. The chatter on Main Street (a.k.a. Google, Yahoo! and other search sites) is always of interest to investors on Wall Street. Thus, each day, TheStreet compiles the stories that are trending on the Web, and highlights the news that could make stocks move.-- Written by Brittany Umar.