Abstract: A video display unit has a box defined by peripheral frame members along each edge thereof, the box having front, rear, top, bottom and two side faces. Abutment surfaces are located on the peripheral frame members along the top and sides, for abutting corresponding abutment surfaces of other such display units. A video projector is mounted in a lower portion of the box, to project an image upwardly. A mirror is mounted in an upper portion of the box, angled to direct the image from the video projector forwardly towards an upper portion of the front face of the box. Three detachable mullions, namely an upper mullion and two side mullions, are mounted along top and side edges of the front face and extend slightly forwardly and outwardly therefrom. The mullions having longitudinal channels running the length thereof on opposite sides thereof, the mullions being symmetrical about longitudinal axes, the axes being parallel to the front face and aligned with respective ones of the abutment surfaces.