Video recording technology allows for the discovery of psychological phenomena that might otherwise go unnoticed. We focus here on gesture as an example of such a phenomenon. Gestures are movements of the hands or body that people spontaneously produce while speaking or thinking through a difficult problem. Despite their ubiquity, speakers are not always aware that they are gesturing, and listeners are not always aware that they are observing gesture. We review how video technology has facilitated major insights within the field of gesture research by allowing researchers to capture, quantify, and better understand these transient movements. We propose that gesture, which can be easily missed if it is not a researcher’s focus, has the potential to affect thinking and learning in the people who produce it, as well as in the people who observe it, and that it can alter the communicative context of an experiment or social interaction. Finally, we discuss the challenges of using video technology to capture gesture in psychological studies, and we discuss opportunities and suggestions for making use of this rich source of information both within the field of developmental psychology and within the field of organizational psychology.