Writer-director Dan Gilroy’s “Nightcrawler” is the sort of absurdist thriller that presents uncomfortable truths in an entertaining, but undeniably disturbing, manner. The focus is on Louis Bloom (Jake Gyllenhaal), a shifty hustler who makes his living by any means possible. One day, he stumbles upon an auto accident and learns that freelance TV crews make good money selling crash footage to local news outlets. So, Louis gets a cheap video camera and launches his career.