Why can old films be in full HD or 4K quality today when in the times they were produced that screen resolution didn't exist? - Quora

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Why does a physical film have such a higher resolution than most digital videos? - Quora

Does the quality decrease when you display a low resolution image on a high resolution screen? - Quora

Why are most movies shot and released in 2.21:1 when most modern screens have a 16:9 aspect ratio? - Quora

Do old movies look better in 4k? - Quora

How come old films are available as HD videos nowadays? - Quora

Why do old games look so bad in 4K? - Quora

How can old movies be upscaled to 4K? Were the pixels there to begin with or do they reconstruct the image later and add in what's missing? - Quora

How come old films are available as HD videos nowadays? - Quora

Do old movies look better in 4k? - Quora

Does 4K mean double the resolution of 1080p? If so, where does the 4K come from if it is only double the resolution? - Quora