The way pr colorizes all videos at once is as follows:

Tools/materials: Computer: ASUS Flying Fortress, system version: win10, pr2017 version number: 11.0.0.

1. First, let us open our pr in our computer as shown in the figure below.

2. We first import multiple video materials on the time track, then right-click on a blank space in the project panel and select New Project Adjustment Layer as shown in the figure below.

3. Drag the adjustment layer to the right and expand the adjustment layer to the desired position as shown in the picture below.

4. Directly adjust the color of the adjustment layer to adjust the color of all videos as shown in the figure below.