In New Zealand the controversial internet tycoon, Kim Dotcom, has launched a new file-sharing business just a year after he was forced to close a similar website.

His previous venture Megaupload.com accounted for more than 4% of the world's internet traffic, but authorities in the United States claim the site facilitated massive online piracy.

Kim Dotcom, who denies wrongdoing, faces up to 20 years in prison if he is convicted.

The BBC's Greg Ward met the tycoon at his mansion and sent us this report from Auckland.