Match-movement is used in nuke to track a camera movement of a video. This is used so that we the software understands where the camera is going based on a camera tracker. This tracker calculates all the movements the camera makes based on different points throughout your scene. When you track the movements you will be able to add 3D objects into your scene as desired. In nuke you can change from your 2D scene to your 3D scene using your TAB button on your keyboard.
In class we added the 3D camera tracker and removed all the tracks that were not tracking correctly. You will end up with a lot of green lines that show the path of the track. in your scene you will be able to visualize the floor selecting the different floor dots and connecting this to it being a floor. After this you can add different 3D objects into your 3D scene.
We played around with it during he class and got this added to our homework to play around with. I added a flooring to the base of the image and 2 cylinders. I connected this to a checkerboard grid so you can see it visibly in the scene. The card I used is representing the road through the scene and the 2 cylinder blocks I placed on this are shown to really get a clear image of the movement of the scene and where these objects are suppose to stay put in place.