How do you mute an embedded Youtube player?

Question

I'm experimenting with the Youtube player but I can't get it to mute by default.

function onPlayerReady() {     player.playVideo();     // Mute?!     player.mute();     player.setVolume(0); } 

How do I mute it from the start?

Fiddle

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Update:

JavaScript Player API is deprecated.
Use iframe Embeds instead.

Answer 1

Turns out player.mute() works fine. It only needed the parameter enablejsapi=1. Initial test in the fiddle didn't work because the player initiation had an error. The following works.

HTML:

<iframe id="ytplayer" type="text/html" src="https://www.youtube-nocookie.com/embed/zJ7hUvU-d2Q?rel=0&enablejsapi=1&autoplay=1&controls=0&showinfo=0&loop=1&iv_load_policy=3" frameborder="0" allowfullscreen></iframe> 

JS:

var player;  function onYouTubeIframeAPIReady() {     player = new YT.Player('ytplayer', {         events: {             'onReady': onPlayerReady         }     }); }  function onPlayerReady(event) {     player.mute();     player.playVideo(); } 

Fiddle

^{Credit to Gagandeep Singh and Anton King for pointing to enablejsapi=1}

Answer 2

All above answers didn't work for me for some reason. It might be weird wordpress theme that I had to use or depreciated methods at Youtube API, I'm not sure. The only way of muting the player was to insert the code below into tag.

// Loads the IFrame Player API code asynchronously.    var tag = document.createElement('script');    tag.src = "https://www.youtube.com/player_api";    var firstScriptTag = document.getElementsByTagName('script')[0];    firstScriptTag.parentNode.insertBefore(tag, firstScriptTag);      // Replaces the 'ytplayer' element with an <iframe> and    // YouTube player after the API code downloads.    var player;    function onYouTubePlayerAPIReady() {      player = new YT.Player('ytplayer', {          height: '390',          width: '640',          videoId: 'YOUR_VIDEO_ID',          playerVars: {            autoplay: 1,            controls: 1,            disablekb: 1,            hl: 'ru-ru',            loop: 1,            modestbranding: 1,            showinfo: 0,            autohide: 1,            color: 'white',            iv_load_policy: 3,            theme: 'light',            rel: 0          },          events: {              'onReady': onPlayerReady,          }      });    }    function onPlayerReady(event){      player.mute();  }

<div id="ytplayer"></div>