A The ibisPaint does not have this feature. However, if you upload your video to YouTube using your Google account, you can add music to the video using YouTube’s built-in features.
Please follow the steps below.

<How to Add Music to a YouTube Video>

1. Open the YouTube website in a browser like Safari and log in with the account used for the upload.
   
2. On an iPhone, iPad, or iPod touch, tap the button in the top left corner of the page, then select "PC" from the menu that appears.
   
3. Click (or tap) your account button in the top right corner of the page.
   
4. A menu will appear—click (or tap) "Manage Videos."
   
5. A list of uploaded videos will be displayed. Click (or tap) "Add Music" on the video where you want to add music.
   
6. A page for selecting music will appear. Choose the music you want to add, then click (or tap) the "Save" button.