Extract youtube video caption from its API response!

extract_youtube_captions.js

// As per Oct 2024

// On click of caption icon on youtube player, a API (https://www.youtube.com/api/timedtext) will get trigger, check in network tab. 
// Get the response and pass that payload in below javascript function
// **payload and API might get change in future.

function getCaption(payload) {
  const concatenatedString = payload.events
    .flatMap(event => event.segs ? event.segs.map(seg => seg.utf8) : [])
    .join('');

  console.log("concatenatedString ====> \n", concatenatedString)
}