Refactor SignItVideosIframe.html js

[hugolpz]

Use :

function getUrlParameter(name) {
  const urlParams = new URLSearchParams(window.location.search);
  return urlParams.get(name) || '';
}
// Assuming the URL is "http://example.com/?search=test&lang=en"
console.log(getUrlParameter('search')); // Output: "test"
console.log(getUrlParameter('lang'));   // Output: "en"
console.log(getUrlParameter('page'));   // Output: ""

[hugolpz]

✅ Done !