you want to UNCHECK the "Sync Movies" Box. Since the movies are already synced. The difficult part is STOPPING the sync as soon as you plug your iPhone in to your computer. During one of the workshops at the Apple Store, you are able to CLICK the "canceling sync..." which is in the iTunes window at the very top of your iTunes Homepage. You should click immediately on that little CIRCLE with the X in the middle. That'll get your syncing canceled, then you can go to VIDEO and UNCLICK "Sync Movies" and then you can sync your music, photos, ringtones and you should be good! 😎