I understand that screen resolution is the number of pixels measured horizontally and vertically. Then the size of the screen is used to calculate the PPI. But if my screen resolution is only 2796×1920, how would I be able to view any video in 4K?
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The video image just gets resampled to fit the screen, taking an average color across multiple pixels. It happens when going to full screen regardless of the picture dimensions. Computer screens rarely match the video size.
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