Warren Buffett just made a big investment in the satellite radio leader.SiriusXM (SIRI -3.98%) isn't without risk. Subscriber numbers have been moving in the wrong direction, and there are some legitimate concerns. But as longtime Fool.com contributors Rick Munarriz and Matt Frankel discuss in this video, it could be worth a closer look.*Stock prices used were the morning prices of Aug. 20, 2024. The video was published on Aug. 21, 2024. ...