what are the different art pieces called?

[xokia]

 

What art is the grey box?

And then to get a video of the game play? 

Is there a tutorial on what the different art pieces are and how they get used?

 

[C-Beats]

Appears to be the 3D model which can use Box - Front, Box - Back, Box - Spine or Box - Full Scan to render appropriately. You can override what model is used on a per platform or per game basis inside of LaunchBox as well