SPOILER ALERT: This article contains spoilers for “ Obsession ,” now playing in theaters. Twenty-six year-old director Curry Barker started his filmmaking career by posting short-form videos on TikTok, YouTube and other social media platforms. That led him to shooting an hour-long, twisty horror movie called “Milk & Serial” that put him on the map after he released it for free on YouTube. Now, Barker is bringing his first-ever full-length film to theaters this weekend with “Obsession” from