On the Movies tab you can control the syncing of movies and videos that aren't TV shows (those are synced on the next screen).
- Sync Movies - Check this box if you want to sync movies or other videos from your computer to your iPhone. Once you check this, each movie listed in the Movies box below will light up and have a checkbox next to it. To sync a given movie, click its checkbox.
- Automatically Include - Click this is you want iTunes to automatically sync movies by default. The menu next to it will allow you to choose your preferences for what movies to sync and how.
- All or Other Options - Your options here include the most recent movies added to your iTunes library whether you've watched them or not, all unwatched movies, or unwatched movies based on how recently you added them.