1. Open the clip, select distortion and transformation, and drag the special effects to the video source at the bottom.

2. After the window pops up on the left, we click the rectangular check box.

3. Adjust the cuboid selection position and circle the leg of the character.

4. Uncheck the box in front of scaling, and then click the scaling height.

5. Move the picture down and lengthen your legs, that's all.