JavaScript help to publish (mark as Private) your draft videos.
- Go to YouTube Studio's "Content" page.
- Select your draft videos.
- Press F12 to open console.
- Paste the entire content of youtube-publish-selected.js file.
- Hit enter, and wait.
It should work as of 2024-03-22.
Youtube allow to edit the visibile of multiple videos at once after draft videos marked as private (by this script).