Open Control Center
Tap the Screen Recording button
Wait for the 3-second countdown
To record with audio, press and hold the Screen Recording button, then tap the Microphone icon
To stop recording, tap the red status bar or red recording indicator, then tap Stop
Find the recording in the Photos app
On Mac, press Shift + Command + 5
Select Record Entire Screen or Record Selected Portion
Click Record
To stop recording on Mac, click the Stop button in the menu bar
Find the recording in the location you selected