What does Blockbuster's (NASDAQ:BBI) recent Movielink acquisition mean for Netflix (NASDAQ:NFLX)? What does it mean for Blockbuster? What threats do Amazon (NASDAQ:AMZN), Apple (NASDAQ:AAPL), and Microsoft (NASDAQ:MSFT) pose in the battle for video-on-demand? In this installment of "Fool Video," I ask Motley Fool senior analyst Rick Munarriz.