Get the ID of a YouTube video using it's URL. Returns false if no ID can be found.

get-youtube-id-by-url.js

function getYouTubeIdByUrl(url) {
  var regExp = /^.*(youtu.be\/|v\/|u\/\w\/|embed\/|watch\?v=|&v=)([^#&?]*).*/,
      match  = url.match(regExp),
      result = false;

  if( match && match[2].length == 11 ) {
    result = match[2];
  }

  return result;
}