y2u.be is a free YouTube short URL service. You can use the shorten URL for Twitter, e-mail and blog.
y2u.be is only for YouTube movie URL , cannot shorten other URLs. The link by y2u.be redirect to YouTube, so you can clarify that shortening URL link is not any advertising or illegal link.
y2u.be shortening system is simple. It can be incorporated into your application and web service free (including commercial use).
https://www.youtube.com/watch?v=j4dMnAPZu70
http://y2u.be/j4dMnAPZu70
y2u.be is a third party service. It is not related to YouTube & Google inc.