$( function(){
    Shadowbox.init( { autoplayMovies: true, players: ['swf', 'flv', 'html'], animate: false, fadeDuration: 0,
        onOpen: function(){ 
        },
        onClose: function(){
        }
    },
        function(){ 
            setTimeout( 'playVideo()', 500 ); 
        } 
    );
});

function playVideo( value ){
    $('#Play_Button').click();
}