With Windows Movie Maker in Windows XP, you can save your movie on your computer, and then upload the video file to a webpage or a social networking site, such as YouTube, Myspace, or Facebook.
When you've finished your movie, save it. To learn how, see Save your movie on your computer.
Go to the webpage or social networking site and follow the steps provided by the third party to upload video files from your computer.
Social networking sites such as Facebook, Myspace, and YouTube require you to have an account to post movies.