docker-docs/layouts/_partials/youtube-script.html

<script>
  (function() {
    var tag = document.createElement('script');
    tag.id = "youtube-iframe-api";
    tag.src = "https://www.youtube.com/iframe_api";
    var firstScriptTag = document.getElementsByTagName('script')[0];
    firstScriptTag.parentNode.insertBefore(tag, firstScriptTag);

    window.onYouTubeIframeAPIReady = function() {
      var youtubeDivs = document.querySelectorAll(".youtube-video");
      for (var i = 0; i < youtubeDivs.length; i++) {
        createPlayer(youtubeDivs[i].id, youtubeDivs[i].dataset.videoId);
      }
    }

    function createPlayer(domElementId, videoId) {
      new YT.Player(domElementId, {
        width: "100%",
        height: "100%",
        videoId: videoId,
        playerVars: {
          'rel': 0,
          'iv_load_policy': 3,
          'enablejsapi': 1,
          'origin': window.location.origin
        },
        events: {
          'onStateChange': function (event) {
            onPlayerStateChange(event, videoId);
          }
        }
      });
    }

    function onPlayerStateChange(event, videoId) {
      if (window.heap === undefined) return;

      var properties = {
        video_id: videoId,
        page_path: window.location.pathname,
        page_title: document.title,
      };

      if (event.data == YT.PlayerState.PLAYING) {
        heap.track("Video Play", properties);
      } else if (event.data == YT.PlayerState.PAUSED) {
        heap.track("Video Paused", properties);
      }
    }
  })();
</script>