PHP JQuery CheckBox

maybe the problem is on jquery..

    var myData = {
    video: $("input[name='video[]']:checked").serialize(),
    sinopse: $("#sinopse").val(),
    dia: $("#dia").val(),
    quem: $("#quem").val()
};

jQuery.ajax({
            type: "POST", // HTTP method POST or GET
            url: "response.php", //Where to make Ajax calls
            dataType:"text", // Data type, HTML, json etc.
            data:myData, //Form variables
            success:function(response){
                $("#responds").append(response);
                $(".video").val(''); //empty text field on successful
                $("#sinopse").val('');
                $("#dia").val('');
                $("#quem").val('');
                $("#FormSubmit").show(); //show submit button
                $("#LoadingImage").hide(); //hide loading image

            },

all the others variables is saved on database, less the "video" >(