Hollywood movie studio Warner Brothers is using Facebook to let users stream full-length films through the social networking platform. Initially available in the U.S. only, the service will grant users a 48-hour window to stream a movie for a fee starting as low as $3 -- or 30 Facebook Credits -- and they can pause and restart the movie as needed without losing any functionality. Interestingly enough, , the audio-visual quality on the Facebook video isn’t great at this point, but the social networking site would be wise to work on that front and attract other studios. If the pilot program is successful, Facebook's huge user base could make it a serious contender to Netflix and the like.