How to watch Movies online Officially and for free?

You tube has started a new service some time back of showing full length movies online for free and they earn through some adds which come up during the movie is played just like TV commercials.

Here is the site (http://www.youtube.com/movies). It has a wide collection of movies most of them are classic hits and the video quality is also really good. So the next time you feel like watching a movie online you tube is one more option you have.