YouTube viewers can also be buyers

Los Angeles: Ever watched a video on YouTube and wanted to buy the song? YouTube is counting on it.

The world's most popular video-sharing site is hoping to make money by installing buttons under YouTube videos so that the ability to buy the music and video games featured in the clip is just one click away.

The "click to buy" buttons, which began appearing last week, connect viewers to the product page on Amazon.com or Apple Inc.'s iTunes. To start, YouTube, which will receive a commission for each sale, is selling songs from two major labels, EMI Music and Universal Music Group, and video games from Electronic Arts Inc. Eventually it wants to expand to sales of movies, television shows and concert tickets.

"This is the first step in a viable e-commerce platform," said Bakari Brock, business affairs counsel at YouTube.

It's another effort by the video-sharing site to figure out how to profit from its popularity. So far, YouTube has focused on advertising as a source of income, including text ads that run along the bottom of videos as they play, contests sponsored by advertisers and home-page video ads. But it has begun to experiment with new ways to take advantage of the site.