Try this below code, Hope it helps you.
<html>
<head></head>
<body>
<div id="player">
<object width="640" height="360">
<param name="movie" value="https://www.youtube.com/v/Zhawgd0REhA?version=3"></param>
<param name="allowFullScreen" value="true"></param>
<param name="allowScriptAccess" value="always"></param>
<embed src="https://www.youtube.com/v/Zhawgd0REhA?version=3" type="application/x-shockwave-flash" allowfullscreen="true" allowScriptAccess="always" width="640" height="360"></embed>
</object>
</div>
<a href="#" önclick="changevideo('oKiYuIsPxYk')"> HTY dargon</a>
<a href="#" önclick="changevideo('q6uoyPTcfic')"> despicable me 2</a>
<script>
function changevideo(id)
{
var divObj = document.getElementById('player');
divObj.innerHTML = '<object width="640" height="360">'+
'<param name="movie" value="https://www.youtube.com/v/'+ id + '?version=3"></param>' +
'<param name="allowFullScreen" value="true"></param>'+
'<param name="allowScriptAccess" value="always"></param>'+
'<embed src="https://www.youtube.com/v/'+id+'?version=3" type="application/x-shockwave-flash" allowfullscreen="true" allowScriptAccess="always" width="640" height="360"></embed>'+
'</object>';
}
</script>
</body>
</html>