regexpsyoutube-regex 
The correct Youtube video id regex. Regex done right!
Install 
Install with npm
$ npm install youtube-regex
$ npm testOnline
Usage
var youtubeRegex = require('youtube-regex');
// contains youtube url address
youtubeRegex().test('unicorn youtube.com/watch?v=0EWbonj7f18');
//=> true
// also these will works
youtubeRegex().test('youtube.com/watch?v=0EWbonj7f18');
//=> true
youtubeRegex().test('youtube.com/watch?feature=related&v=0EWbonj7f18');
//=> true
youtubeRegex().test('youtube.com/watch?v=0EWbonj7f18&feature=related');
//=> true
youtubeRegex().test('http://www.youtube.com/watch?v=0EWbonj7f18');
//=> true
youtubeRegex().test('http://www.youtube.com/watch?feature=related&v=0EWbonj7f18');
//=> trueFor more use-cases see tests
Authors & Contributors
Charlike Mike Reagent 
License 
Copyright (c) 2014 Charlike Mike Reagent, contributors.
Released under the MIT license.