Wii Transfer makes it easy to find movies to prepare for streaming to your Wii. If you are running Mac OS X 10.5 Leopard, a "Find Movies" button will appear at the bottom of the Movies pane. Click it for a grid layout showing files in the Movies folder in your home folder. You can also quickly filter by filename or show movies from iPhoto or iTunes.
To convert the movies, select one or more icons and click the "Process Selected Movies" button.