Detect Flash support and revert to standard YouTube embed code to enable HTML5 player

youtube-html5-switch.js

if (swfobject.hasFlashPlayerVersion("8.0.0")) {
	// insert the chromeless player with custom controls and skinning
	alert('you have flash, so getting the chromeless/skinned player');

	// Lets Flash from another domain call JavaScript
	var params = { allowScriptAccess: "always" };
	// The element id of the Flash embed
	var atts = { id: "ytPlayer" };
	// All of the magic handled by SWFObject (http://code.google.com/p/swfobject/)
	swfobject.embedSWF("http://www.youtube.com/apiplayer?" +
		"&enablejsapi=1&playerapiid=player1", 
		"videoDiv", "640", "385", "8", null, null, params, atts);
}
else {
	// insert the standard embed, standard controls but html5 supported
	alert('no flash, using html5 player if possible');
			
	var videoDiv = document.getElementById('videoDiv');
	videoDiv.innerHTML = '<object width="640" height="385"><param name="movie" value="http://www.youtube.com/v/YJp7tqRyJAI?fs=1&amp;hl=en_US"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/YJp7tqRyJAI?fs=1&amp;hl=en_US" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="640" height="385"></embed></object>';
}