hayk

$.ajax({
    url: './ajax/data.php',
    type: 'POST',
    data: {comment: $("#comment").val()},
    dataType: 'json',
    success: function(data) {
        //...
    }
})

 $.post("./ajax/data.php",
    {
        comment  : $("#comment").val()
    },
    function(data) {
        ...
    },"json");

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<meta property="og:video:type" content="application/x-shockwave-flash">
<meta property="og:video:width" content="398">
<meta property="og:video:height" content="224">