To add background music to videos shot with a camera, you can use Douyin. The specific steps are as follows.
1. First, open the Douyin short video software, as shown in the figure below.
2. Second, after entering the software, click the plus sign below as shown in the picture below.
3. Third, after clicking, the shooting page will pop up. Then click the upload button in the lower right corner as shown in the picture below.
4. Fourth, find the video you shot and click as shown in the picture below.
5. Fifth, after uploading the video, click Next as shown in the picture below.
6. Sixth, click on the lower left corner to select the soundtrack as shown in the picture below.
7. Seventh, choose your favorite music as shown in the picture below.
8. Finally, after adding background music to the video, click Publish to save it as shown in the picture below.