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  • Unless you want to type the captions down by hand you would need some kind of script or bot to harvest them, which is forbidden by Youtube's TOS, so that would be the first problem you would have to solve.
    – user9838
    Commented Jul 29, 2020 at 21:18
  • @EikePierstorff That's a part of my question, but I'm not sure what you wrote is necessarily a true. A web scraper needs to respect a robots.txt file in order not to violate the rules and there's a separate endpoint providing the subtitles under google.com which doesn't have any robots.txt file: video.google.com/timedtext. There's also an official API endpoint giving you access to subtitles albeit more restricted. Commented Jul 30, 2020 at 14:22
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    Right, my bad. I looked at the general TOS, but the API is a separate product (which you are obviously allowed to use, else it would be pointless :-) ) . Sorry for the noise.
    – user9838
    Commented Jul 30, 2020 at 14:27
  • @EikePierstorff No worries, it's a valid concern as there's no unrestricted official access. It seems to be a grey area. Thanks for the input anyway :) Commented Jul 30, 2020 at 15:58