Celebrate St. Patrick’s Day With This Guinness Documentary

Best enjoyed while drinking a Guinness.

YouTube contains treasures you would never imagine it would or imagine exist at all, like this excellent National Geographic documentary on Guinness beer. It's under an hour and takes you through the history of the company, how Guinness is made, and how to correctly pour a Guinness. The last part is the most important if you're faced with a bartender who doesn't know what he or she is doing.