At the very least, you can do a screenshot by hitting the "Print Screen" button on your keyboard, then going into a picture program and hitting paste into a blank picture document.
Doesn't always work, if the video is being played on the graphics card's overlay. Besides, from the description, there's only one shot it can be. And to be honest, the DVD picture is so dark, and the shot is so short, I can't tell for sure whether Peter's got his Chewie head on or not.
David