From the Website: "VideoPoint is a video analysis software package for Windows(tm) based computers that allows you to collect position and time data from digital video in the form of "Video Points." Data is collected by clicking on the location of the items of interest for each frame of a QuickTime(tm) movie. These points can be combined to form other calculations such as center of mass locations and distances between points. Furthermore, multiple reference frames can be used to analyze relative motion."