Breaking down coffee based on roasts, processing, freshness, varietals, and source

What can you tell about your coffee by its taste, look, and smell?
This is a great basic, yet comprehensive video by Epicurious with Dillon Edwards of Parlor Coffee. Via a blind taste test set up, Dillon breaks down coffee's roasts, processing, freshness, varietals, and source; and why some coffee cost more than others.