Hey, here is how you get that "window" in your you-tube video. Go to your account, and go to the video manager. (under your username in the top right) Find the video you want to change. Then at the top there is a black bar. Click on the "Annotations" button. Then you can "Add annotation" From here you can change duration, change position in the video and such. Hope that helps!
Very creative use of parts and it looks just like the big machines you see levelling the gravel roads in Patagonia. This little MOC is packed with details would have loads of play options. Excellent & fun!