Architectural motion picture is a special video when the building "starts moving" - we show the building and its environment by an imaginery camera.
The visualization motion is closer tho reality than still renderings, gives better sense of the massing, proportion and size.
Walkaround (or flyaround) movie: external - an animation where we look at the building from the bird's eye view or a human eye view, showing the massing and the relation between the building and its environment.
We can show natural lighting and its changes
In a night render it's possible to experiment with the artifical lighting of the building and its effect to its environment.
We can show the building mass
Or examine how the building lives together with the environment
Putting people and vegetation into the rendering gives scale to the building
Interior walk movie: shows interiors, makes a virtual walkaround in the building
We can experiment and design artifical lighting
We can show the interior design elements
It's possible to show the natural lighting and its effect to the interior