1. First, use PremierePro video editing software to import the recorded video into the software and enlarge the video. You can hold down the alT key to scroll the wheel.

2. Secondly, to eliminate the neckline, you need to select the repair tool in the toolbar and click the topic. Draw a small area at the neckline. Don't draw too many areas outside the neckline.

3. After the final area is drawn, hold down the left mouse button and drag it to a place where there is no neckline, and click Repair.