Video stars: The No. 1 best seller on USA TODAY's Best-Selling Books list, John Green's The Fault in Our Stars, features star-crossed lovers. Now the young-adult author and Internet celebrity is unveiling a project with his own wife. Green and Sarah Urist Green are launching a video series with PBS Digital Studios that "celebrates risk-taking in the creative process and the act of making art." It's not Green's first foray into Web videos — he and his brother, Hank, star in the vlogbrothers YouTube videos. Get an exclusive look at the trailer starring the Greens here: click here.