A playback method performed by a playback device that plays content, the playback method comprising: obtaining a type of a display device connected to the playback device; obtaining, from a recording medium, output control information of the content recorded on the recording medium; obtaining, from the recording medium, a video signal of the content recorded on the recording medium; and (a) outputting the obtained video signal to the display device without converting image quality of the video signal, when the obtained output control information does not restrict output of content using a first copyright protection technology, and (b) converting the image quality of the obtained video signal and outputting the video signal to the display device, when the obtained output control information restricts output of content using the first copyright protection technology and output using the first copyright protection technology is performed according to the obtained type of the display device, the recording medium records a plurality of video signals for playing same content, at least one of a resolution and a luminance range differing between the plurality of video signals, and characterized in that in the obtaining of the video signal, one video signal is selected from among the plurality of video signals according to the obtained type of the display device, and the selected video signal is obtained from the recording medium, wherein the type of the display device is one of: a first type indicating a display device whose resolution is a first resolution and which supports a first luminance range; a second type indicating a display device whose resolution is a second resolution and which supports the first luminance range; a third type indicating a display device whose resolution is the first resolution and which supports a second luminance range; and a fourth type indicating a display device whose resolution is the second resolution and which supports the second luminance range, wherein the second resolution has a larger number of pixels than that of the first resolution, and wherein the second luminance range includes the first luminance range and has a higher peak luminance than that of the first luminance range. obtaining a type of a display device connected to the playback device; obtaining, from a recording medium, output control information of the content recorded on the recording medium; obtaining, from the recording medium, a video signal of the content recorded on the recording medium; and (a) outputting the obtained video signal to the display device without converting image quality of the video signal, when the obtained output control information does not restrict output of content using a first copyright protection technology, and (b) converting the image quality of the obtained video signal and outputting the video signal to the display device, when the obtained output control information restricts output of content using the first copyright protection technology and output using the first copyright protection technology is performed according to the obtained type of the display device, the recording medium records a plurality of video signals for playing same content, at least one of a resolution and a luminance range differing between the plurality of video signals, and characterized in that in the obtaining of the video signal, one video signal is selected from among the plurality of video signals according to the obtained type of the display device, and the selected video signal is obtained from the recording medium, wherein the type of the display device is one of: a first type indicating a display device whose resolution is a first resolution and which supports a first luminance range; a second type indicating a display device whose resolution is a second resolution and which supports the first luminance range; a third type indicating a display device whose resolution is the first resolution and which supports a second luminance range; and a fourth type indicating a display device whose resolution is the second resolution and which supports the second luminance range, a first type indicating a display device whose resolution is a first resolution and which supports a first luminance range; a second type indicating a display device whose resolution is a second resolution and which supports the first luminance range; a third type indicating a display device whose resolution is the first resolution and which supports a second luminance range; and a fourth type indicating a display device whose resolution is the second resolution and which supports the second luminance range, wherein the second resolution has a larger number of pixels than that of the first resolution, and wherein the second luminance range includes the first luminance range and has a higher peak luminance than that of the first luminance range.