Warner currently has Warner Bros. Records, Rhino Records and Atlantic Records as part of its business -- providing even more content to Hulu.

The site is best known for full-length movies and TV episodes, but last month signed a music video distribution with EMI Music.

"We're pleased to be working with Hulu as we expand our premium ad-supported video strategy to provide our artists with a customized and flexible approach to marketing and monetizing their music," said Michael Nash, Warner Music executive VP, in a statement.

Music labels have been more willing to work with Hulu over YouTube since Hulu provides copyrighted and professional content only.  YouTube is available only in the United States, however, which limits the number of viewers that can view content offered by record labels.

Hulu does plan to expand to other nations, but hasn't said which nations will get Hulu.  

Music labels have seen album sales drastically decline as more music listeners begin to embrace MP3s and other digital formats.  Furthermore, peer-to-peer music piracy also has been blamed for declining sales, which has forced music labels to begin working with Apple iTunes, YouTube, MySpace, Hulu, and other online businesses.