Yahoo! Webplayer beta script for hosting on your own domain since Yahoo! removed the webplayer docs and scripts from their servers on June 1st, 2013

yahoo-webplayer-beta.js

/* Yahoo! WebPlayer Loader, Build 0.9.76.  Copyright (c) 2013, Yahoo! Inc.  All rights reserved.
 * Your use of this Yahoo! WebPlayer is subject to the Yahoo! Terms of Service
 * located at http://info.yahoo.com/legal/us/yahoo/webplayer/details.html
 */
(function(){var d="http://yui.yahooapis.com/3.5.1/build/yui/yui-min.js";if(typeof YAHOO=="undefined"){YAHOO={};}if(typeof YAHOO.MediaPlayer=="undefined"){YAHOO.MediaPlayer=function(){this.controller=null;};}YAHOO.MediaPlayer.isAPIReady=false;YAHOO.MediaPlayer.onAPIReady={subscribers:[],fire:function(){for(var f=0;f<this.subscribers.length;f++){if(YAHOO.MediaPlayer.isAPIReady===true){try{this.subscribers[f]();}catch(g){}}}},subscribe:function(e){this.subscribers.push(e);}};YAHOO.WebPlayer=YAHOO.MediaPlayer;var c=false;function b(f,h){var e=document.createElement("script");e.setAttribute("type","text/javascript");e.setAttribute("src",f);var g=document.getElementsByTagName("head")[0];e.onload=e.onreadystatechange=function(){if(!e.readyState||/loaded|complete/.test(e.readyState)){e.onload=e.onreadystatechange=null;h&&h();}};g.appendChild(e);}function a(f){var e=window.YUI&&parseInt(YUI().version.replace(/\./g,""),10);if(e){if(e>=340){f();}}else{c=true;b(d,f);}}a(function(){YUI({"injected":c}).use("node-base",function(g){if(typeof YAHOO.namespace=="undefined"){YAHOO.namespace=g.namespace;}var o=3;var x=true;var m=["NETSCAPE6","NETSCAPE/7","(IPHONE;","(IPOD;"];if(navigator){var w=m.length;for(var v=0;v<w;v++){if(navigator.userAgent.toUpperCase().indexOf(m[v])!==-1){x=false;}}}if(x===true){if(typeof YAHOO.mediaplayer=="undefined"){YAHOO.namespace("YAHOO.mediaplayer");}var t=function(i,z,y){y=y||window;if(o===2){YAHOO.util.Event.addListener(y,i,z);}else{g.Event.attach(i,z,y);}};var u=function(i,z,y){y=y||window;if(o===2){YAHOO.util.Event.removeListener(y,i,z);}else{g.Event.detach(i,z,y);}};var l=function(y){var z="#";var i=y.indexOf(z);if(i<0){z="%23";i=y.indexOf(z);}return(i===-1)?"":y.substring(i+z.length);};var p=function(D){var B=window.location.toString();var C=l(B);var z=C.split("-");for(var A=0,y=z.length;A<y;A++){if(D===z[A].substring(0,D.length)){return true;}}return false;};var n=function(){var z=-1;if(navigator.appName=="Microsoft Internet Explorer"){var i=navigator.userAgent;var y=new RegExp("MSIE ([0-9]{1,}[.0-9]{0,})");if(y.exec(i)!=null){z=parseFloat(RegExp.$1);}}return z;};var h=function(z){var B=null;for(var A=0,y=z.length;A<y;A++){if((z[A].nodeType===1)){B=z[A];break;}}return B;};var s=function(z){var y=null;var i=document.createElement("DIV");i.innerHTML=z;return h(i.childNodes);};var f=function(){var y="cursor:pointer;padding:0;margin:0;position:fixed;top:0;left:0;height:100%;width:100%;background:rgba(0,0,0,0.8);";y+="filter:progid:DXImageTransform.Microsoft.gradient(startColorstr=#aa000000,endColorstr=#aa000000);";y+="-ms-filter:progid:DXImageTransform.Microsoft.gradient(startColorstr=#aa000000,endColorstr=#aa000000);z-index:2147483647;";var i='<div class="ywp-page-overlay" style="'+y+'">'+'<div style="width:100%; height:100%; *background-color: white; *filter: alpha(opacity=0)">'+'<div style="position:fixed;z-index:2147483647;top:50%;left:50%;height:1px;">'+'<div style="width:100px; height:100px; margin-top:-50px;margin-left:-50px; background-color:transparent;">'+'<img width="100px" height="100px" src="'+YMPParams["assetsroot"]+'/img/page-overlay/loading.gif"/>';"</div>"+"</div>"+"</div>"+"</div>";return s(i);};var e=function(){var y=f();var z=null;var A=null;var C=function(D){if(D.keyCode===27){B();}};var B=function(){YAHOO.mediaplayer._vLboxDisabled=true;A&&clearTimeout(A);y&&y.parentNode.removeChild(y);u("keydown",C,document.documentElement);u("click",B,y);delete YAHOO.mediaplayer._hideOverlay;};YAHOO.mediaplayer._hideOverlay=B;document.getElementsByTagName("body")[0].appendChild(y);t("click",B,y);t("keydown",C,document.documentElement);var i=YMPParams["assetsroot"];A=setTimeout(function(){var D='<div style="position:absolute;top:30px;right:30px;cursor:pointer;">'+'<img width="28px" height="28px" src="'+i+'/img/page-overlay/close.png"/>'+"</div>";z=s(D);y.appendChild(z);},10000);};var r=function(){return window.YAHOO&&window.YAHOO.mediaplayer&&window.YAHOO.mediaplayer._isPlayerAlreadyLoaded?true:false;};var k=n();var j=(p("vlbox")&&((k===-1)||(k>=7)||(document.compatMode!=="BackCompat")))?true:false;if(!r()){YAHOO.mediaplayer.partnerId="42858483";if(typeof YMPParams=="undefined"){window.YMPParams={};}YMPParams["assetsroot"]=YMPParams["assetsroot"]||"http://l.yimg.com/pb/webplayer"+"/"+"0.9.76";YMPParams["wsroot"]=YMPParams["wsroot"]||"http://ws.webplayer.yahoo.com";YMPParams["wwwroot"]=YMPParams["wwwroot"]||"http://webplayer.yahoo.com";YMPParams["build_number"]="0.9.76";if(typeof YMPParams==="object"&&YMPParams.logging===true){if(typeof(YAHOO)==="undefined"||typeof(YAHOO.ULT)==="undefined"){var q=document.createElement("script");q.type="text/javascript";q.src="http://us.js2.yimg.com/us.js.yimg.com/ult/ylc_1.9.js";document.getElementsByTagName("head")[0].appendChild(q);}}YAHOO.mediaplayer.loadPlayerScript=function(){if(r()){return;}if(Boolean(arguments.callee.bCalled)){window.status="asyncLoadPlayer Already Called! (webplayerloader)";return;}arguments.callee.bCalled=true;if(j){e();}function i(){return YMPParams["assetsroot"]+"/js/player-noyui-min.js";}var y=i();if(typeof(y)=="string"&&y.length>0){YAHOO.mediaplayer.elPlayerSource=document.createElement("script");YAHOO.mediaplayer.elPlayerSource.type="text/javascript";YAHOO.mediaplayer.elPlayerSource.src=y;document.getElementsByTagName("head")[0].appendChild(YAHOO.mediaplayer.elPlayerSource);window.YAHOO.mediaplayer._isPlayerAlreadyLoaded=true;}};}}if(!r()){if(document.readyState!=="complete"){g.on((j?"domready":"load"),YAHOO.mediaplayer.loadPlayerScript,window);}else{YAHOO.mediaplayer.loadPlayerScript();}}});});}());

can you explain how it work??