In order to give Khan Academy permission to upload captions to your youtube account <a href="https://accounts.google.com/o/oauth2/auth?access_type=offline&redirect_uri=http%3A%2F%2Ftoby.khanacademy.org%2Foauth2callback&response_type=code&client_id=179486897809-667mgavcflo02du8ttbbedjtg1chn345.apps.googleusercontent.com&scope=https%3A%2F%2Fgdata.youtube.com+https%3A%2F%2Fwww.googleapis.com%2Fauth%2Fyoutube.force-ssl+https%3A%2F%2Fwww.googleapis.com%2Fauth%2Fuserinfo.email+https%3A%2F%2Fwww.googleapis.com%2Fauth%2Fuserinfo.profile&approval_prompt=force">click here<a/>