Start with the action you want to prevent
A child choosing an adult profile, opening a mature programme and buying a rental are three separate situations. Prime Video provides controls for profiles and for account activity, so it helps to name the problem before changing a PIN. Write down which screen is shared and whether the concern is browsing, playback or a charge. This keeps a useful setting from being mistaken for a complete household policy.
A profile lock protects entry to a profile
Amazon describes profile locking as a way to require a PIN before someone opens that personal profile. It is relevant when recommendations, viewing progress or an adult catalogue should not be available merely by selecting another avatar. Amazon also offers a control over creating and removing profiles. Check that separately: leaving unrestricted profile creation can undermine the arrangement you intended to keep.
Purchase and viewing restrictions need their own check
The Prime Video account PIN is used to override purchase or viewing restrictions. Creating a PIN alone does not establish that the desired restriction has been switched on. Amazon’s Android instructions explicitly separate those actions. Check the account setting and the devices to which viewing restrictions apply, then try an appropriate restricted action while signed in as the household would normally watch.
Treat Fire TV as a separate surface
Amazon says Fire TV devices have their own parental-control settings, managed on the device. A browser setting is therefore not a reason to skip the television. Review the Fire TV controls, test the expected result and keep the PIN private. This is guidance about Amazon’s software controls; it does not describe a UK IPTV child account or establish any service connection allowance.
Questions, answered
Does creating a Prime Video PIN automatically enable restrictions?
No. Amazon separates setting the PIN from switching restrictions on. Check the relevant purchase and viewing settings, including the devices to which viewing restrictions apply.