What if the phone turns gray in the photo album after cutting the short video?

Choose the right format or use the right device when rendering.

The editing software has HDR format. First, you should clip the original video in HDR, and then play the rendered HDR video on the screen that supports HDR, so that the saved video effect will not be grayed out.

HDR means high dynamic range imaging. In computer graphics and cinematography, it is a set of techniques used to obtain a larger exposure dynamic range than ordinary digital imaging techniques.