Time-lapse photography is a technique where each frame is captured at a much slower rate than it is played back. When it is replayed everything appears to be moving faster.
Tilt-shift photography is a technique of distorting the plane of focus of an image by tilting the camera lens and distorting the perspective by shifting the lens. This leads to images which appear to be of miniture worlds.
Combining these two techiniques creates some interesting videos, such as the one below by Keith loutit.
I found this video here at Web Urbanist. They have a couple more examples by Keith Loutit, along with several examples of tilt-shit photography.