How one single man discovered censorship on a major German news site

So there is this really smart guy called David, who also discovered a major bug in Xerox printers which lead to printing false information. Yes you heard right, the printer printed false data. The devices from Xerox were being used by individuals, businesses and military! So you can guess what happened / could have happened.
But in this talk, he basically downloaded a German news site and found really amazing results just by analyzing meta data(author, date, time published..) and not the content itself! Watch and enjoy!