Sync movies between your Mac and iPhone or iPad
You can sync all or a selection of your movies on your Mac to your device.
For more information about syncing, see About syncing your Mac and your devices.
Sync movies to your device
Connect your device to your Mac.
You can connect your device using a USB or USB-C cable or using a Wi-Fi connection. To turn on Wi-Fi syncing, see Sync content between your Mac and iPhone or iPad over Wi-Fi.
In the Finder
on your Mac, select the device in the Finder sidebar.
Select Movies in the button bar.
Select the “Sync movies onto [device name]” checkbox to turn on syncing of your movies.
With the checkbox selected, syncing is set to transfer all your movies to your device.
To sync a selection of movies, select the “Automatically include” checkbox, then choose the number of recent or unwatched movies from the menu.
Select the checkboxes for the individual movies you want to sync in the movies list. Deselect the checkbox for any movie you don’t want to sync.
When you’re ready to sync, click Apply.
You can choose to sync your Mac and your device automatically whenever you connect them. To turn on automatic syncing, select General in the button bar, then select “Automatically sync when this [device] is connected.”
Before disconnecting your device from your Mac, click the Eject button 
in the Finder sidebar.
Remove automatically synced movies from your device
To remove an unwanted movie from both your Mac and device, delete the movie from your Mac and sync your device.
To remove a movie from just your device while keeping it on your Mac, follow these steps:
Connect your device to your Mac.
You can connect your device using a USB or USB-C cable or using a Wi-Fi connection. To turn on Wi-Fi syncing, see Sync content between your Mac and iPhone or iPad over Wi-Fi.
In the Finder
on your Mac, select your device in the sidebar, then select Movies in the button bar.In the movies list, deselect the checkbox of the movie you want removed.
Sync your Mac with the device.
WARNING: If you delete an automatically synced item from your Mac, the deleted item is removed from your device the next time you sync.
Before disconnecting your device from your Mac, click the Eject button in the Finder sidebar.