Amazon.com(NASDAQ:AMZN) and Baidu(NASDAQ:BIDU) reported better-than-expected earnings this week. Yahoo!(NASDAQ:YHOO) reported worse than expected earnings. And XM Satellite Radio(NASDAQ:XMSR) reported, well, narrower-than-expected losses. Can Amazon maintain its momentum? Is Baidu the next Google(NASDAQ:GOOG)? Does Yahoo need Microsoft(NASDAQ:MSFT) to right the ship? What would a merger with Sirius(NASDAQ:SIRI) mean for XM investors? In this installment of “Fool Video,” Motley Fool senior analyst Rick Munarriz gives his take.