WebVTT

• https://www.html5rocks.com/en/tutorials/track/basics/
• add track with kind="metadata"
• track = html element
• track.track = TextTrack instance = videoElement.textTracks[0];

trackElement.addEventListener('cuechange', (evt)=> {
  let activeCues =  trackElement.track.activeCues;
  if(activeCues.length > 0) {
    let frameData = activeCues[0].text;
    console.log(evt.timeStamp, frameData);
  }
});

• reaction graph with VOD
• special events + sponsorship
• offline page mockup
• discovery of like streams