Using Youtube API for stop video by playing another one - youtube-api

Question

I'm trying to stop emebed youtube video when another one is played on the same page, I found this:
stackoverflow
fiddle-example
But when i try to use it on my web page it doesn't work:
my_test
SCRIPT
<script>
var tag = document.createElement('script');
tag.src = "//www.youtube.com/iframe_api";
var firstScriptTag = document.getElementsByTagName('script')[0];
firstScriptTag.parentNode.insertBefore(tag, firstScriptTag);
function onYouTubeIframeAPIReady() {
var $ = jQuery;
var players = [];
$('iframe').filter(function(){return this.src.indexOf('http://www.youtube.com/') == 0}).each( function (k, v) {
if (!this.id) { this.id='embeddedvideoiframe' + k }
players.push(new YT.Player(this.id, {
events: {
'onStateChange': function(event) {
if (event.data == YT.PlayerState.PLAYING) {
$.each(players, function(k, v) {
if (this.getIframe().id != event.target.getIframe().id) {
this.pauseVideo();
}
});
}
}
}
}))
});
}
</script>
HTML
One:
<iframe frameborder="0" allowfullscreen="1" title="YouTube video player" width="160" height="100" src="http://www.youtube.com/embed /zXV8GMSc5Vg?enablejsapi=1&origin=http%3A%2F%2Ffiddle.jshell.net"> </iframe>
<br/>
Two:
<iframe frameborder="0" allowfullscreen="1" title="YouTube video player" width="160" height="100" src="http://www.youtube.com/embed/LTy0TzA_4DQ?enablejsapi=1&origin=http%3A%2F%2Ffiddle.jshell.net"> </iframe>
What's wrong? I've created the project on google developers, i've created the API key but i don't know where i must put that.

Answer 1

You forgot to add the jquery lib ( https://code.jquery.com/ )

Answer 2

SOLVED
The problem was that in the example they used the "origin" parameter, this parameter if setted avoids the introduction into the page of malicious third-party JavaScript code, which can take control of the YouTube player.
src="http://www.youtube.com/embed/LTy0TzA_4DQ?enablejsapi=1&origin=http%3A%2F%2Ffiddle.jshell.net"
This is why the code work on the fiddle page but not on mine.
So i've changed this origin path with my complete URL of the host page and now it work!