Regex to extract the youtube id from given url.
Install with npm
$ npm install youtube-id-regex
var youtubeIdRegex = require('youtube-id-regex');
youtubeIdRegex().test('yourString') // Returns true or false.
youtubeIdRegex().exec('yourString')[1]; // Returns the youtube id.Urls with youtube.com but also youtube-nocookie.com are supported.
// Results as true.
youtubeIdRegex().test('youtube.com/watch?v=z9dIAG2gpwc');
youtubeIdRegex().test('youtube.com/watch?feature=related&v=z9dIAG2gpwc');
youtubeIdRegex().test('youtube.com/watch?v=z9dIAG2gpwc&feature=related');
youtubeIdRegex().test('www.youtube.com/watch?v=z9dIAG2gpwc&feature=related');
youtubeIdRegex().test('youtube-nocookie.com/watch?feature=related&v=z9dIAG2gpwc');
youtubeIdRegex().test('youtube-nocookie.com/watch?v=z9dIAG2gpwc&feature=related');
youtubeIdRegex().test('www.youtube-nocookie.com/watch?v=z9dIAG2gpwc&feature=related');
youtubeIdRegex().test('https://www.youtube-nocookie.com/watch?v=z9dIAG2gpwc&feature=related');
youtubeIdRegex().test('http://www.youtube-nocookie.com/watch?v=z9dIAG2gpwc&feature=related');
youtubeIdRegex().test('http://www.youtube.com/watch?v=z9dIAG2gpwc');
youtubeIdRegex().test('http://www.youtube.com/watch?feature=related&v=z9dIAG2gpwc');// Results as true.
youtubeIdRegex().test('Just some text with this https://www.youtube.com/watch?v=z9dIAG2gpwc youtube video link in it.');
