Prints out the captions from a JW video

downloadJWcaptions.js

innerDoc = document.getElementsByClassName("jwplayer"); 

var getVideo = innerDoc[0].getElementsByTagName('video')[0];

for (index = 0; index < getVideo.textTracks[0].cues.length; ++index) {
    document.write(getVideo.textTracks[0].cues[index].text + " ");
}