I viewed the video and I read the related article... and it says here:
A small team of trusted senior reporters examined Snowden's files in a secure fourth-floor room in the Guardian's King's Cross office. The material was kept on four laptops. None had ever been connected to the internet or any other network. There were numerous other security measures, including round-the-clock guards, multiple passwords, and a ban on electronics.
Okay, 4 laptops are fine. So why does the video show a desktop keyboard? And why is there a completely destroyed ATX desktop motherboard shown there?