javascript / youtube api - variable YT is not defined

Question

I\'m creating a youtube player embed via the YT api but I keep getting an alert that the variable YT is not defined. I can see that the script for the youtube API is getting

Answer 1

You'll need to wrap the YT call in a function and call it when the script is included. Or you can add the script from the file instead of calling that script to include another script.

function doYT(){
    window.player = new YT.Player('video_player', {
        width: '768',
        height: '432',
        videoId: vidID,
        events: {
            'onReady': onPlayerReady,
            'onStateChange': onPlayerStateChange
        }
    }
}

window.YT && doYT() || function(){
    var a=document.createElement("script");
    a.setAttribute("type","text/javascript");
    a.setAttribute("src","http://www.youtube.com/player_api");
    a.onload=doYT;
    a.onreadystatechange=function(){
        if (this.readyState=="complete"||this.readyState=="loaded") doYT()
    };
    (document.getElementsByTagName("head")[0]||document.documentElement).appendChild(a)
}();