I was recently on a panel with Jena Janovy, an editor at ESPN.com, who made a compelling case for long-form sports journalism on the Web. Janovy said that visitors to the Outside the Lines section often spend seven minutes or more on a single online feature. One of the most successful video documentaries on the site is called “Getting Off The Mat,” a profile of 36-year-old college wrestler Richard Jensen and his struggle to overcome drug addiction.