By means of the present invention, coordination and synchronization of independently obtained and stored video recordings which may be relatively lengthy with short term, isolated happenings or collections of segment of video depicting acts or facts may be easily extracted for viewing. In a specific embodiment, monochromatic blue or UV light output from a light-emitting diode is down-converted to white light by packaging the diode with fluorescent organic andor inorganic fluorescers and phosphors in a polymeric matrix. The speed actuator is calibrated to actuate speeds, via the microcontroller, in a range from a minimum speed to a maximum speed. Also disclosed are methods and systems for using the described indexes and modifiers to plan, estimate, and bill advertisements. 7, and \u2022y has a value from 0.