1. First open the iEditor software on your computer.

2. Edit the video title in the window that appears.

3. Then click the OK button at the bottom of the interface.

4. Then add the video at the bottom of the interface.

5. Select the video to be edited in the interface that appears.

6. Then click the Open button at the bottom right of the interface.

7. Then click OK.

8. Then click the audio button in the upper left corner of the interface.

9. Find Add Audio at the bottom of the interface and click to add background music.

10. Select the music you need in the window interface that appears.

11. Then click the Open button.

12. Enter the end time in the interface that appears.

13. Finally, click OK to add background music to the video.