How to access subtitles of Khan Academy videos? [closed]

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I'm curious to know, how to download the subtitles for the videos of Khan Academy. As far as I know, universalsubtitles[dot]org has the subtitles. But I'm unable to get any results from my API calls. Here are a few sample calls that I tried which do not give any result but rather says that 'We're sorry - the page you are trying to access does not exist':

• http://www.universalsubtitles.org/api/1.0/subtitles/?video_url=http://www.youtube.com/watch?v=qYZF6oIZtfc&feature=youtube_gdata_player
• http://www.universalsubtitles.org/api/1.0/subtitles/?video_url=http://www.youtube.com/watch?v=qYZF6oIZtfc&feature=youtube_gdata_player&language=en

I tried quite a few other formats of the above API calls too, but none of them seem to work. So could someone please help me out on how to access subtitles of Khan Academy videos. I would also appreciate your answers, even if they have other ways of accessing Khan Academy videos' subtitles other than accessing it from universalsubtitles[.]org

Answer 1

You can use the undocumented API call "http://www.khanacademy.org/api/internal/videos/%s/transcript" where %s is the YouTube ID of the video. You will get the transcript lines for the video with start and end times for each line. I don't know if there is a better way.