How to cut out the green screen material?

Cut the green screen material to remove the green color according to the following steps:

Tools/materials: iPhone 12, iOS 15.3. 1, newspaper clippings 8.2.0.

1. Upload the first video and click the Add Picture-in-Picture option.

2. Upload the local green screen material of the mobile phone and put it at the time when it needs to appear.

3. Click to select the green screen material, and then click the chroma matting button.

4. Drag the color picker to select the green screen.

5. Drag the button to adjust the intensity and eliminate the color of the green screen. Click the checkmark to confirm.