1. Before opening pr to add video special effects to the video, add a video material to the video track V 1 for standby.

2. Open the Effects panel, click the Expand button in front of Video Effects, and then click the Expand button in front of Distortion.

3. Click and drag the "Bend" video special effect on the "Effects" panel, drag it to the material of the audio track V 1, and then release your finger.

4. After adding video special effects, the video material will be automatically selected and turned white.

5. Open the "Effect Control" panel, and then set the special effects parameters of the bending video.

6. Click the "Play" button in the "Program" panel to play the video, and then you can see the added video effects.