The Denial Twist. This reminds me of my favorite Gondry video (Let Forever Be) in that an elaborate illusion is created which you're sure must be some fancy computer modelled effect. then, at the end, Michel purposely reveals to you the simple analog techniques he's been using. in this case he built multiple versions of the Conan O'Brien set with weird proportions, all on a single sound stage. Jack and Meg move from room to room (a surreal retelling of the week they guested on Conan for 5 consecutive nights) he alters the vertical or horizontal hold on the video (or uses distorted lenses, can't tell) so that the sets appear properly proportioned and the stripes seem to stretch like taffy. it's like a fluid riff on the "ames room". didja ever play in one of those in a children's museum when you were a kid?
Viewed from a certain perspective, the room appears to be an normal cubic room with a level floor, when in reality it's a TRAPEZOID with the floor tilting at a sharp angle towards one of the far corners.
Your brain assumes that the back wall is a flat surface perpendicular to you, and that becomes your frame of refrence. When people move from one side of the room to the other, they seem to grow or shrink rapidly with each step. What's brilliant is how Gondry moves our Stripes through a series of these warped environments, seeming rapidly to stretch and squash, all in one uninterrupted shot. Michel is clearly the greatest conceptual film/video director of our time, which is a statement I am willing to back up with fisticuffs.