$(document).ready(function() {

  document.getElementById('submitButton').onclick, function() {

    var form = $('#videoForm');

    $.ajax({
            method: 'get',
            url: 'dashboard/video/upload/payment/submit',
            data: {
              'length': $length,
            },
            'ajax': true,

        success: function(data) {

            try {
                data = JSON.parse(data)
            } catch (e) {
                return alert("Error parsing response");
            }

            if (data) {
                $signature = data['signature'];
                $expiration = data['expiration'];
                document.getElementsByTagName("camera")[0].setAttribute("data-signature", $signature);
                document.getElementsByTagName("camera")[0].setAttribute("data-signature-expiration", $expiration);
                myCamera.publish();
            } else {
                return alert("Payment could not be completed");
            }
        },
        error: function(data) {
            // Error from the server (404, 503)
        }
    });
  }
}