Bird's-eye view video generation device, bird's-eye view video generation method and non-transitory storage medium

A bird's-eye view video generation device includes a video data acquisition unit configured to acquire surroundings video data by capturing videos of surroundings of a vehicle, an inclination data acquisition unit configured to acquire inclination data representing an inclination of the vehicle, a bird's-eye view video generator configured to perform viewpoint conversion processing on the videos of the surroundings using a virtual viewpoint at which the vehicle is looked down from above and synthesize the converted videos of the surroundings to generate a bird's-eye view video, and a controller configured to cause the bird's-eye view video generator to perform the viewpoint conversion processing on the videos of the surroundings using the virtual viewpoint whose position is adjusted based on the inclination data acquired by the inclination data acquisition unit and synthesize the converted videos of the surroundings of the vehicle to generate the bird's-eye view video.