SPOILER ALERT: This article contains spoilers for the ending of “ Shelby Oaks ,” now playing in theaters. So, who took Riley Brennan? Director Chris Stuckmann makes his directorial debut with Neon’s horror “Shelby Oaks,” which follows the disappearance of a YouTuber and amateur ghost hunter Riley Brennan (Sarah Durn). Having started his career as a film critic and essayist on YouTube, Stuckmann makes the transition to director with a horror movie that expertly blends media and feels at times