iOS on iPhones is many things and one of them is its ability to record screen in high-resolution. Now, many people do use the built-in screen recording feature on any generation of iPhone you can say and usually stop by tapping into the Control Center to stop it. Talking about the screen recording feature, there is a useful tip that you can follow to stop recording from anywhere without tapping into the Control Center.
Once you have turned ON screen recording feature on your iPhone or iPad or iPod Touch, the status bar where the clock and battery and other icons are shown turns red. Tapping on the bar itself will turn off screen recording there itself.
Note that depending upon the iPad or iPhone model you have, the bar could turn red differently as the entire bar could turn red or an icon or a button could turn red tapping which, the iPhone will automatically stop recording the screen.

