This paper describes a dynamic multi-video user interface for sports coaching. It is intended that sports coaches could use this split screen to minimise and maximise multiple video streams of an athlete on one side of the split screen, while playing an additional video source on the other side of the split screen, such as a clip from a professional athlete. This split screen approach allows users to contrast movements in the athletes videos, with that of a professional. Users can also avail of the ability to use video overlays, text input and can also use screen capture technology to record the application display, so that an athlete can review a coaching session at later date.