How to record an iPhone screen video
1. Go to Settings and press Control Center.
2. Select Customize Controls.
3. Press plus Add Screen Recording.
4. Drag your finger from the top right corner to open the Control Center.
5. Press the Screen Recording button and swipe up to close the Control Center to capture the desired screen.
6. When satisfied, press the red button on the top left corner.
7. Press Stop to stop recording. The video will go to your Photos Library.