1. A video display method of, when displaying an image in a video signal on a per frame basis, representing a picture level using a plurality of sub-frames, the video display method comprising: generating a visible light communication image by encoding a visible light communication signal, the visible light communication image being an image having a stripe pattern for visible light communication; calculating average luminance of the visible light communication image; superimposing the visible light communication image only on, among one or more sub-images included in the image of the video signal that is displayed in the frame, a sub-image that is displayed in a specific sub-frame among one or more sub-frames in each of which a corresponding one of the one or more sub-images is displayed, to generate a visible light superimposition image, the specific sub-frame being a sub-frame for representing the average luminance calculated; and displaying the visible light superimposition image in the specific sub-frame included in the frame, wherein a value of the average luminance of the stripe pattern is less than 2% of a maximum value of a luminance of the picture level.