find youtube url in html string , replace it with embed iframe

function findAndReplace(str) {
  const reg = /(?:youtube\.com\/(?:[^\/]+\/.+\/|(?:v|e(?:mbed)?)\/|.*[?&]v=)|youtu\.be\/)([^"&?\/ ]{11})/g;
  const replace = '<iframe width="560" height="315" src="https://www.youtube.com/embed/$1" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>';
  if(reg.test(str) === true) {
    str = str.replace(reg, replace);
  }
  return str;
}

findAndReplace("https://www.youtube.com/watch?v=4-e_1HwCJh0")
// <iframe width="560" height="315" src="https://www.youtube.com/embed/4-e_1HwCJh0" frameborder="0" allow="accelerometer