Video rental stores made it so you don’t have to go all the way to a theater to watch a movie, then online video channels like Netflix and iTunes made is so you don’t even have to leave the house. The next step will be that you won’t even have to leave the warm, squishy embrace of Facebook in order to watch movies on demand. The social network’s hooked up with Warner Bros. to provide users with streaming videos for a rental fee of three bucks. Just visit the movie’s Facebook profile, pay the toll, and you get access to the film for 48 hours.