The X-Factor is what takes a good company and makes it great. It's what takes good returns for shareholders and turns them into the kind of once-in-a-lifetime, 100-bagger opportunities that define an entire career. It's hard to say just what the X-factor is, but it explains the brilliant long-term success of companies like Whole Foods, Southwest Airlines, and many others.

In this Fool TV video, analyst Nick Kapur explains why you've got to search for the X-factor. He also discusses one company that has it, Walt Disney (NYSE: DIS), and compares it to competitors Comcast (Nasdaq: CMCSA) and News Corp. (Nasdaq: NWSA), which he says lack the X-factor. Watch the video here: