Youtube RexExp utilities

youtubeUtils.ts

const playlistId = new RegExp(/(?:http|https|)(?::\/\/|)(?:www.|)(?:youtu\.be\/|youtube\.com(?:\/embed\/|\/v\/|\/watch\?v=|\/ytscreeningroom\?v=|\/feeds\/api\/videos\/|\/user\S*[^\w\-\s]|\S*[^\w\-\s]))([\w\-]{12,})[a-z0-9;:@#?&%=+\/\$_.-]*/)
const videoId = new RegExp(/(?:http|https|)(?::\/\/|)(?:www.|)(?:youtu\.be\/|youtube\.com(?:\/embed\/|\/v\/|\/watch\?v=|\/ytscreeningroom\?v=|\/feeds\/api\/videos\/|\/user\S*[^\w\-\s]|\S*[^\w\-\s]))([\w\-]{11})[a-z0-9;:@#?&%=+\/\$_.-]*/)

const getYouTubeId = (youTubeUrl: string): string | undefined => {
  const regExp = /^.*(youtu.be\/|v\/|u\/\w\/|embed\/|watch\?v=|\&v=)([^#\&\?]*).*/
  var match = youTubeUrl.match(regExp)
  if (match && match[2].length == 11) {
    return match[2]
  }
  return undefined
}


export function getYoutubeVideoId(url: string): string | undefined {
  const regExp = new RegExp(
    /(?:http|https|)(?::\/\/|)(?:www.|)(?:youtu\.be\/|youtube\.com(?:\/embed\/|\/v\/|\/watch\?v=|\/ytscreeningroom\?v=|\/feeds\/api\/videos\/|\/user\S*[^\w\-\s]|\S*[^\w\-\s]))([\w\-]{11})[a-z0-9;:@#?&%=+\/\$_.-]*/
  );
  const match = url.match(regExp);
  if (match && match[1]) {
    return match[1];
  }
}
/**
 * Get playlist id from url
 *
 * @param {string} url the youtube url
 * @returns {string|undefined} the playlist id
 */
export function getYoutubePlaylistId(url: string): string | undefined {
  const regExp = new RegExp(
    /(?:http|https|)(?::\/\/|)(?:www.|)(?:youtu\.be\/|youtube\.com(?:\/embed\/|\/v\/|\/watch\?v=|\/ytscreeningroom\?v=|\/feeds\/api\/videos\/|\/user\S*[^\w\-\s]|\S*[^\w\-\s]))([\w\-]{12,})[a-z0-9;:@#?&%=+\/\$_.-]*/
  );
  if (url.includes('list=')) {
    const match = url.match(regExp);
    if (match && match[1]) {
      return match[1];
    }
  }
  return;
}

export const getEmbedUrl = (youTubeUrl: string | null | undefined): string | undefined => {
  if (youTubeUrl) {
    const videoId = getYouTubeId(youTubeUrl);
    if (videoId) {
      return `https://www.youtube.com/embed/${videoId}`
    }
  }
  return undefined;
}

Original source from php code here