A video output device includes a screen configuration management section for managing a placement or a scaling of a screen for displaying at least one video, an area determination section for determining a character area in an input video, a supplemental information storing section for cutting out a video on a supplemental information area including the at least one character area determined by the area determination section and storing it as supplemental information, a supplemental information display determination section for determining whether or not the supplemental information stored by the supplemental information storing section is displayed in addition to an input video based on the screen configuration managed by the screen configuration management section, and an output section for outputting the input video and the supplemental information in accordance with commands from the screen configuration management section and the supplemental information display determination section. The supplemental information display determination section determines that the supplemental information is displayed based on a size of a character included in the character area in the input video changing in response to a scaling managed by the screen configuration management section. Therefore, the display form of the supplemental information can be changed in response to a scaling factor of the display size of the input video.