BBC

The BBC is to open up its vast archive of video and audio in an on-demand trial involving more than 20,000 people in the UK.Broadcasters around the world are grappling with the shift to on-demand media, with many firms now offering content online or via mobile devices.The archive trial will make available 1,000 hours of content drawn from a mix of genres to a closed number of people. About 50 hours - of both TV and radio programmes - will be available in an open environment for general access.People who are interested in participating in the trial should register at bbc.co.uk/archive.