Instructions in this article apply to devices with iOS 10 or later.
What Are Automatic Downloads?
Automatically downloading content is helpful if you own multiple Apple devices, keeping your content in sync.

With automatic downloads enabled, new purchases also download to other family devices.
What Are Some Problems With Automatic Downloads?
There’s a downside to automatic downloads: lack of storage space.

Turning off automatic downloads is one way tosave iPad storage spaceand helps you better manage your devices.
Under theAutomatic Downloadssection, toggle onApps.
New purchases and free downloads made on other devices will now be automatically downloaded on all your devices.

Toggle onAutomatic Downloads forApp Updatesif you want to update an app on only one equipment.
The other devices with YouTube installed will update automatically.