Google says it will not "voluntarily" comply with the government's request that it censor YouTube videos in accordance with broad "refused classification" (RC) content rules.

Communications Minister Stephen Conroy referred to Google's censorship on behalf of the Chinese and Thai governments in making his case for the company to impose censorship locally.

Google warns this would lead to the removal of many politically controversial, but harmless, YouTube clips.

University of Sydney associate professor Bjorn Landfeldt, one of Australia's top communications experts, said that to comply with Conroy's request Google "would have to install a filter along the lines of what they actually have in China".

As it prepares to introduce legislation within weeks forcing ISPs to block a blacklist of RC websites, the government says it is in talks with Google over blocking the same type of material from YouTube.