Map Viewer can be used to generated movies (in mp4 format) from a set of maps. This is useful because:
On a computer, movies are just a series of frames (or pictures) that get replaced in a particular time frequency.
Usually, when you see formats like (.mp4) it just means you have a set of images and a sound file tied together. With that in mind, movies produced by the Map Viewer follow the same definition. The user is required to load the maps (which are going to be the images in the movie) he wants to display and then configure the viewer main area as if it was the movie itself. Transformations (zoom, pan) are kept on the movie, as well as histogram curves, palettes for each images and transparency.