Look at my grades, look at yours, now back to mine. If you want to get A’s like these, study at the library and not in the shower or a cave. That’s the message of a BYU video promo that has gone viral on the Internet, focusing an unexpected national spotlight on the school’s multimedia lab that produced the ad, as well as its comedy troupe, Humor U. The “New Spice” video, starring psychology major Stephen Jones, spoofs the Old Spice “smell like a man, man” ad campaign that pitched a virile line of body wash. “I’ve always loved entertaining,...