detect youtube link in text and replace it with embed

function youtubeEmbed(text) {
  let youtubeReg = /(https?:\/\/)?(www\.)?(youtube\.com|youtu\.?be)\/.+/gi;
  let youtubeMatch = text.match(youtubeReg);
  if (youtubeMatch) {
    let youtubeEmbed = youtubeMatch[0].replace("watch?v=", "embed/");
    text = text.replace(youtubeMatch[0], `<iframe width="420" height="315" src="${youtubeEmbed}"></iframe>`);
  }
  return text;
}