I've been using yt-dlp to download the cc transcriptions that yt provides. Not sure if that would work for you. There is a npm library to interface with yt-dlp

I've been using yt-dlp to download the cc transcriptions that yt provides. Not sure if that would work for you. There is a npm library to interface with yt-dlp from node. I think it's yt-dlp-exec