1. A video image pickup apparatus comprising: a solid-state image pickup device; a high-luminance compression processor configured to perform a high-luminance compression of a first picture signal based on an output signal of the solid-state image pickup device to provide a second picture signal; a block luminance calculator configured to divide a frame of image based on the output signal of the solid-state image pickup device into a set of blocks, and calculate a set of luminance indices of respective blocks; a block extractor configured to extract a first block having a highest luminance index, together with the luminance index thereof; a display information generator configured to generate a set of pieces of image information for exposure guide display including an image representing a region of the first block and an image representing the luminance index thereof; an image superposer configured to superpose a flame of image based on the second picture signal and the set of pieces of image information for exposure guide display, on each other, to generate a frame of superposed image; and a display configured to display the flame of superposed image.