Adding caption to Photo Booth video on MacBook with macOS Sonoma.

I'm working on a 16-inch Mac with Ventura 13.6.3. I have in mind making a video in Photo Booth with captions or subtitles. I know how to make the video, but I don't know how to add the captions or subtitles. I want instructions as to how to add them to the video if that can be done.

[Re-Titled by Moderator]