In a parallel universe Notch may have hired this guy to make a trailer for his up and coming game 0x10c. However he's not that lucky in this universe. Notch tweeted about this teaser trailer earlier this day saying “This made my day”. Even I realized that this was fake because the guy didn't seem to be affiliated with Mojang in any way and Notch has just barely started on the game. The only pictures of the game are the photos of what Notch has been working on so far such as lighting, design, and the computer.
Seriously though Notch should consider getting this guy on board at Mojang for voice overs and what not. Although the only way that might happen is if we tell him not to use this guy. As with Minecraft it's most likely Notch will not listen to a lot of what users want put into the game.