In Step 2 of Captionizer, you will have the option to read the existing captions from a YouTube video.
The original captions need to be created already, in the original language, else Captionizer won't be able to download them.
For most languages, YouTube will auto generate captions and Captionizer will be able to read them and translate them.
In case you have no auto captions created, you will first need to create the original captions.
1. To do that, go to YouTube studio:
2. Browse to your video and click on EDIT
3. After that, click on more options.
4. If you do not see the Auto generated subtitles, click on Subtitles to generate the original subtitles.