To get a plain-text version of the automatic captions for a YouTube video video, paste a URL or the 11-character ID for your targeted YouTube video, then click “Go.”
How to extract closed caption transcript from YouTube video?
youtube-dl –skip-download –write-auto-sub $youtube_url
–write-sub
Write subtitle file–write-auto-sub
Write automatically generated subtitle file (YouTube only)–all-subs
Download all the available subtitles of the video–list-subs
List all available subtitles for the video–sub-format FORMAT
Subtitle format, accepts formats preference, for example: “srt” or “ass/srt/best”–sub-lang LANGS
Languages of the subtitles to download (optional) separated by commas, use –list-sub