Last month, Google kicked off an official YouTube page for the Nexus One. Just this last week, however, they decided to take us on a tour of what goes on behind the device. Over the course of 5 videos, Google has been giving viewers an inside look into everything that has gone into the concept, design, testing, and manufacturing of our favorite Superphone. The last video is expected tomorrow, but you can watch the first 4 installments now. The latest clip shows the handset as it is manufactured and prepped for shipping.