The present invention relates to method and system for ranking videos/movies, and inserting commercial advertisements in the videos/movies. When a user selects a movie or video from Internet, system will allow him to select advertisements, and insert the advertisements into the movie or video before or during broadcasting or downloading. During playing or watching the movie or video, the inserted advertisements will send signals back to a ranking server. Based on the received signals, the ranking server will rank the movie or the video.