<div id="mediaplayer"></div>
    <script>
    $("#mediaplayer").kendoMediaPlayer({
        autoPlay: true,
        media: { title: "Kendo UI for jQuery: Welcome and Overview", source: "https://www.youtube.com/watch?v=UbkbVBNYZMc" }
    });
    
    setTimeout(function () {
        // get a reference to the media player widget
        var mediaPlayer = $("#mediaplayer").data("kendoMediaPlayer");
        // check the current volume of the player
        mediaPlayer.volume();
        // sets the current volume to 50
        mediaPlayer.volume(50);
      }, 1000);
    </script>