In this free online video program, "students will learn the distinction between deterministic phenomena and random sampling. This program introduces the concepts of sample space, events, and outcomes, and demonstrates how to use them to create a probability model. A discussion of statistician Persi Diaconis’s work with probability theory covers many of the central ideas about randomness and probability." This individual video is accessed by scrolling down to the "Individual Program Descriptions - 15. What Is Probability?" and click the "VOD" icon at the top-right of the description.