Every Saturday, Bostonist reaps what YouTube has sewn; bringing you the choicest fruit from this week's crop of Boston-based videos. This week's viral video installment might be a little too ripe for those with delicate sensibilities. YouTube is no stranger to the movie spoof; so it is no surprise that one of the best movies set in our fair city, The Departed, would be given the parody treatment. It's not even particularly shocking that someone......