As WikiLeaks begins publication of more than 250,000 diplomatic cables sent by US embassies around the world, the Guardian, which is one of a group of media organisations publishing a selection (a few hundred) of the cables in partnership with the whistleblowing site, has produced the video below, explaining the significance of the leak:

Video: US embassy leaks: ‘The data deluge is coming …’ | World news | guardian.co.uk.