A video providing system comprising: a memory configured to store device information of a display device (200, 300, 400, 500), wherein the device information includes panel information of panels (311 to 314, 411 to 414) of the display device, converter information of converters (321 to 324, 421, 422) of the display device, and switch network information of the display device; an analyzer configured to receive an original video from the outside and analyze images in the original video, wherein the analyzer analyzes a pattern of a current image, differences between the current image and previous and next images, contrast of the current image, and a distortion which occurs in each image, when a voltage for driving each image becomes low; and a processor configured to generate: from the original video, video streams according to a streaming mode, wherein the streaming mode includes: a first mode in which a first video stream for playing the original video is provided to the display device, and a second mode in which a second video stream for playing a distorted video obtained by distorting the original video is provided to the display device according to a power reduction ratio of the display device determined in advance; and control signals of the display device corresponding to the video streams, based on device information of a display device and analysis information from the analyzer, wherein the control signals comprise a switch network control signal (CTL S) causing the switch network of the display device to change connection between the converters of the display device and sub panels of the display device, and wherein the processor is further configured to provide the video streams and the control signals to the display device. a memory configured to store device information of a display device (200, 300, 400, 500), wherein the device information includes panel information of panels (311 to 314, 411 to 414) of the display device, converter information of converters (321 to 324, 421, 422) of the display device, and switch network information of the display device; an analyzer configured to receive an original video from the outside and analyze images in the original video, wherein the analyzer analyzes a pattern of a current image, differences between the current image and previous and next images, contrast of the current image, and a distortion which occurs in each image, when a voltage for driving each image becomes low; and a processor configured to generate: from the original video, video streams according to a streaming mode, wherein the streaming mode includes: a first mode in which a first video stream for playing the original video is provided to the display device, and a second mode in which a second video stream for playing a distorted video obtained by distorting the original video is provided to the display device according to a power reduction ratio of the display device determined in advance; and control signals of the display device corresponding to the video streams, based on device information of a display device and analysis information from the analyzer, wherein the control signals comprise a switch network control signal (CTL S) causing the switch network of the display device to change connection between the converters of the display device and sub panels of the display device, and from the original video, video streams according to a streaming mode, wherein the streaming mode includes: a first mode in which a first video stream for playing the original video is provided to the display device, and a second mode in which a second video stream for playing a distorted video obtained by distorting the original video is provided to the display device according to a power reduction ratio of the display device determined in advance; and control signals of the display device corresponding to the video streams, based on device information of a display device and analysis information from the analyzer, wherein the control signals comprise a switch network control signal (CTL S) causing the switch network of the display device to change connection between the converters of the display device and sub panels of the display device, and wherein the processor is further configured to provide the video streams and the control signals to the display device.