Warren Buffett says that Berkshire Hathaway (NYSE:BRK-A) (NYSE:BRK-B) will invest at least $5 billion in Goldman Sachs (NYSE:GS). What does Buffett's latest move mean for investors? In this installment of "Fool Video," online managing editor LouAnn DiCosmo talks stocks with senior analyst Tim Hanson. Stocks discussed include Berkshire-Hathaway, Goldman Sachs, Luxottica (NYSE:LUX), and Melco PBL (NASDAQ:MPEL).