Cgi and green-screen make music videos out-worldly in nature and allows the directer to achieve things that aren't physically possible and incorporate them into the video, an example of this is Linkin park's "Castle of glass" music video, where cgi and green-screen are used to create a virtual environment and objects within that environment. In the castle of glass example the pictures below show a part of the music video in reality and after the editing has taken place.
