Instructions
1) Go to Settings > Control Center and make sure that the "Screen Recording" option is added to your Control Center. If not, add it.
3) Tap the Screen Recording icon to initiate a 3 second countdown before the recording starts.
4) Open any app on your device or execute any typical action, and the screen recording will capture the actions.
NOTE: The recording will continue even if you are no longer displaying the Control Center.
5) When you would like to stop recording, tap the red status button at the top of your screen.
TIP: You can also return to Control Center to stop the recording by tapping the Screen Recording button again.
5) To confirm that you wish to stop recording, tap Stop.
Outcome
The recording of your device's screen will appear in the Photos app.
You will also receive a notification.