A video signal processing apparatus comprises an image pickup part arranged to photo-electrically convert an optically formed image and to output it as an electrical signal, an external input part which permits external input of a video signal, and a signal processing part which has a delay circuit. The signal processing part forms a color video signal from the electrical signal outputted from the image pickup part and separates the video signal inputted from the external input part into luminance and chrominance signals by using the delay circuit.