gistfile1.txt

var videoPlaying;
var v = document.getElementsByTagName("video")[0];

// When the video starts
v.addEventListener('playing', function() {
  
  // Poll the video every 5 seconds and keep the Riveted timer going
  videoPlaying = setInterval(function() {
    if (!v.paused) {
      riveted.trigger();
    }
  }, 5000);

}, true);

// Stop polling when the video is paused
v.addEventListener('pause', function() {
  
  clearTimeout(videoPlaying);

}, true);