Video can serve as a powerful medium for analyzing interactions involved in learning activities, for capturing records of teaching for uses in professional development, and for learners to construct or interact with videos expressively, but there have been many barriers to its collaborative uses. The DIVER Project is tackling core problems in advancing computer-supported collaborative video analysis. DIVER establishes a unique video platform for users to control a "virtual camera window" on a computer for guiding noticing to parts of a video of interest as the video is playing-then to text annotate these moments, and publish them on the web for further collaborative analysis. Every DIVER user-researcher, teacher, or learner-can thus express their visual and interpretive point of view on a video, providing an important and accessible tool for making a difference in our research and education. Ongoing studies of learning research and higher education applications using DIVER are discussed.