This video is a high quality training video from The Guerrilla CG Project ( guerrillacg.org ) a non for profit organisation dedicated to teaching the fundamentals of computer graphics.
Objects are simply bundles of polygons with a common pivot point. This tutorial shows how any combination of polygons can make an object, and why objects are so useful.
Author: Andrew Silke
For more information about Computer Graphics and higher quality videos visit The Guerrilla CG Project guerrillacg.org.