How to stop iframe of Youtube video using javascript?

Question

YouTube

Tell me how to stop a YouTube video on a page created by a tag
Tried the Youtube API, while unsuccessfully doing this:

document.getElementById('video').contentWindow.postMessage('{"event":"command","func":"pauseVideo" ,"args":""}', '*');

And here is the iframe itself:

<iframe id='Youtube' class='center-block' src='https://www.youtube.com/embed/$YoutubeCode?enablejsapi=1' frameborder='0' allowfullscreen></iframe>

Answer 1

var player = document.getElementById('Youtube');
player.stopVideo();