It's hard to make one movie that works well for everyone.
Modems can't handle the high data rates required for high quality playback, while people with faster connections expect to see better movies.
You can solve this by making alternate versions of your movie. The QuickTime Plug-in will show each user the best version based on their machine, connection, and software.
Choose the versions you'd like to make from the list at right. Please be aware that the more versions you choose, the longer it will take to prepare your movie.