Syncing Music Videos

Hey there and welcome to Apple Support Communities Longfellow,

We can certainly understand your concern and can help provide some insight.

We recommend checking out these steps for more information on how to sync your data between devices and see if that matches up with your procedures.

" Sync all items of a content type

1. Connect your device to your Mac.
2. You can connect your device using a USB or USB-C cable or using a Wi-Fi connection. See Sync content between your Mac and iPhone, iPad, or iPod touch over Wi-Fi.

In the Finder  on your Mac, select the device in the Finder sidebar.

If you connect your device to your Mac using a USB cable and don’t see the device in the Finder sidebar, see If your device doesn’t appear in the sidebar. 

3. Click the type of content you want to sync in the button bar.

Note: If you use iCloud Photos and Apple Music, your photos and music are synced automatically using iCloud. When you click Music or Photos, no options appear for syncing.

4. Select the “Sync [content type] onto [device name]” checkbox to turn on syncing for that type of item. For example, select the “Sync movies onto [device name]” checkbox to sync your movies.

With the checkbox selected, syncing is set to transfer all items of that type to your device. 

5. Repeat steps 3 and 4 for each type of content you want to sync.

The bar at the bottom of the window shows how much free space remains on your device after you sync. Move the pointer over the bar to view details about the content you’re syncing.

6. When you’re ready to sync, click Apply. "

For additional information, check out these links.

1. Sync content between your Mac and iPhone, iPad, or iPod touch - Apple Support
2. Sync movies between your Mac and iPhone, iPad, or iPod touch - Apple Support

Kindest regards!

Thanks for those additional details Longfellow,

From here, you can connect with Apple directly to report the behavior using either Get Support or if you're in a region without direct support options, you can also Contact Apple for support and service.

Hope that helps.

Take care.