YouTube has automatic caption system. It can transcribe from speech to text. Unfortunately, it doesn’t transcribe audio perfectly. All you can fix it and save your time from typing a whole subtitle without transcribe audio.
You need to:
- Download Transcribe Audio subtitle file from YouTube
- Edit this file with TextEdit (MAC) or WordPad (PC)
- Upload this file to YouTube once you finished fixing subtitle file
- Check if your video can run subtitle properly