this is example for youtube. extracted from https://www.thyngster.com/measure-your-videos-engagement-with-google-analytics/
<script src=”http://www.google.com/jsapi” type=”text/javascript”></script>
<script type=”text/javascript”>
google.load(“swfobject”, “2.1”);
</script>
<script type=”text/javascript”>
function updateHTML(elmId, value) {
document.getElementById(elmId).innerHTML = value;
}
function onPlayerError(errorCode) {
alert(“An error occured of type:” + errorCode);
}
function onPlayerStateChange(newState) {
updateHTML(“playerState”, newState);
}
function updatePlayerInfo() {
var percent = “cargado”;
if(ytplayer && ytplayer.getDuration) {
if(Math.round((ytplayer.getCurrentTime()*100)/ytplayer.getDuration())>0)
percent = ‘0’;
if(Math.round((ytplayer.getCurrentTime()*100)/ytplayer.getDuration())>10)
percent = ’10’;
if(Math.round((ytplayer.getCurrentTime()*100)/ytplayer.getDuration())>20)
percent = ’20’;
if(Math.round((ytplayer.getCurrentTime()*100)/ytplayer.getDuration())>30)
percent = ’30’;
if(Math.round((ytplayer.getCurrentTime()*100)/ytplayer.getDuration())>40)
percent = ’40’;
if(Math.round((ytplayer.getCurrentTime()*100)/ytplayer.getDuration())>50)
percent = ’50’;
if(Math.round((ytplayer.getCurrentTime()*100)/ytplayer.getDuration())>60)
percent = ’60’;
if(Math.round((ytplayer.getCurrentTime()*100)/ytplayer.getDuration())>70)
percent = ’70’;
if(Math.round((ytplayer.getCurrentTime()*100)/ytplayer.getDuration())>80)
percent = ’80’;
if(Math.round((ytplayer.getCurrentTime()*100)/ytplayer.getDuration())>90)
percent = ’90’;
if(Math.round((ytplayer.getCurrentTime()*100)/ytplayer.getDuration())==100)
percent = ‘100’;
if(percent_tmp != percent)
{
_gaq.push([‘_trackEvent’, ‘Videos’, ‘Status’, percent]);
percent_tmp = percent;
}
}
}
function onYouTubePlayerReady(playerId) {
ytplayer = document.getElementById(“ytPlayer”);
percent_tmp = -1;
setInterval(updatePlayerInfo, 1000);
updatePlayerInfo();
ytplayer.addEventListener(“onStateChange”, “onPlayerStateChange”);
ytplayer.addEventListener(“onError”, “onPlayerError”);
}
function loadPlayer() {
var videoID = “rfouqNtKtoQ”
var params = { allowScriptAccess: “always” };
var atts = { id: “ytPlayer” };
swfobject.embedSWF(“http://www.youtube.com/v/” + videoID +
“?version=3&enablejsapi=1&playerapiid=player1”,
“videoDiv”, “480”, “295”, “9”, null, null, params, atts);
}
function _run() {
loadPlayer();
}
google.setOnLoadCallback(_run);
</script>
