YouTube, which became the world's most popular video website by providing an outlet for amateur user-generated clips, is now officially expanding into streaming full-length movies online for rent.

Although the Google video upload and sharing site had experimented with long-form video in the past, it formally entered the online movie rental market on Monday.

Over the coming weeks, YouTube will offer users in the U.S. only thousands of major Hollywood productions, letting people watch movies on its site and competing with Netflix, Amazon and Apple, which all focus on renting long-form movies and TV shows.

Full story: PC World