  Data videos -- motion graphics that incorporate visualizations -- have been
recognized as an effective way to communicate ideas, but creating such video
requires both time and expertise, precluding them from being created and
streamed live. We introduce DataTV, a system for combining multiple media
sources in real time. We validate our work through an expert review involving
researchers using the DataTV prototype to create a one-minute data video for
their current project. Results show that the new method facilitates rapid
creation and enables users to focus on the narrative rather than mechanics of
video production.
