Hong Kong ? China has moved to restrict videos online, allowing only state-controlled sites to post any – including those shared by users – and requiring Internet providers to delete and report a variety of content.

It wasn’t immediately clear how the new rules would affect YouTube and other providers that host Web sites based in other countries that are accessible from China.

A spokesman for San Bruno, Calif.-based YouTube said the restrictions “could be a cause for concern, depending on the interpretation.”

Tudou.com, which claims to be China’s largest video sharing Web site, didn’t immediately respond to an e-mail requesting comment.

The new regulations, which take effect Jan. 31, were approved by both the State Administration of Radio, Film and Television and the Ministry of Information Industry and were described on their Web sites Thursday.

Under the new policy, Web sites that provide video programming or allow users to upload video must have a permit and be either state-owned or state-controlled.