On its surface, Jake Gyllenhaal ’s new movie Nightcrawler is about local TV news in L.A., focusing specifically on the “nightcrawlers” of the title, the freelance videographers who prowl the streets at night, filming the scene of crimes and accidents and selling their wares to networks. But there’s more to the movie, and the work done by Gyllenhaal, co-stars Bill Paxton, Rene Russo and Riz Ahmed and writer-director Dan Gilroy as they prepared for and worked on the indie film that hits theaters Friday . Gilroy explained that as he was researching the world of local TV news, “there was a more nuanced story that I uncovered.”