They are using footage of the old kitchen with Linus standing in front of a green screen and its very, very obvious. They probably messed with the colors and lighting to try to make it less obvious? It just makes it more obvious though. Also 2-3 times in the video they screwed up the scene so the kitchen in the background zooms in/out (2:43), disappears completely (5:41), and the still image vs looped footage gives it no life.
PS: Linus, you can right click on taskbar -> properties and the option for showing/hiding icons in the system tray is in there.