Taiwan ? YouTube co-founder Steve Chen said Saturday consumers in many parts of the world will have access to the popular video-sharing Web site on their mobile phones by next year.

Taiwan-born Chen made the remarks as he spoke to a group of enthusiastic Web users at a forum on Internet developments in Taipei.

Videos of between 30 to 60 seconds could best serve the needs of commuters on subways or buses, while files of up to 10 minutes will be sufficient for train riders, he said.

As Internet technologies develop into the next phase, Web sites should provide richer content and greater mobility so users can have access to them anywhere, Chen said.

Chen was born in Taiwan in 1978 and emigrated to the U.S. with his family at the age of eight. He set up the video-sharing Web site in San Mateo, Calif., with colleague Chad Hurley in 2005 as they found their video files too large to e-mail to others.

Within a year of launch, they sold the Web site to Google at $1.65 billion.