"TRL" played the top ten most requested music videos of the day, as requested by viewers who voted for their favorite video online. The countdown started with the tenth most requested video of the day and ended with the most requested video of the day. As of October 22, 2007, the countdown was based on votes, charts, ringtones, downloads, radio airplay, and streams, meaning that the video that the user requested might not have been the number one video of the day. The show mainly aired from Monday to Thursday for an hour, but the scheduling and length of the show has changed over the years. Even though the word "Live" is in the show's title, a lot of the show's episodes have actually been pre-recorded.