A display device used by being connected to an external video apparatus that reproduces a video content includes: a signal determining section determining the type of a video signal of a video content input from the external video apparatus; a projection setting section making display settings based on the type thus determined, a video projecting section displaying the video content based on the set display settings; and a control command transmitting section transmitting, to the external video apparatus, a reproduction command for starting the reproduction of the video content and a rewind command for reproducing the video content from the head thereof after the projection setting section makes display settings.