How to shoot time-delayed video with iphone?

IOS 8 released by 14 makes the camera have time-lapse photography function, not to mention other time-lapse photography apps and cameras of Android phones. Tools/materials: iPhone 12, iOS 14.7. 1, camera 14.7. 1.0.

1. Enter the camera on the mobile phone, as shown in the figure below:

2. On the camera page, click to enter time-lapse photography, as shown in the following figure:

3. After the time-lapse photography mode page, click HDR on the page, as shown in the following figure:

4. After setting the delay shooting for 20 seconds, just say the number as 20, as shown in the following figure: