text: module.exports = function(string) {
    // adapted from http://stackoverflow.com/a/5831191/1614967
    var youtubeRegexp = /https?:\/\/(?:[0-9A-Z-]+\.)?(?:youtu\.be\/|youtube(?:-nocookie)?\.com\S*[^\w\s-])([\w-]{11})(?=[^\w-]|$)(?![?=&+%\w.-]*(?:['"][^<>]*>|<\/a>))[?=&+%\w.-]*/ig;
    return string.match(youtubeRegexp);
  };