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

Why do the colors look washed out when I switch to 4K on my TV? - Quora

Why do older movies look grainy on a 4K TV? - Quora

Does it take a lot of work to make older movies into HD quality or are they already HD to begin with? - Quora

How do they turn old movies that were originally shot in 4:3 aspect ratio into modern 16:9 without the black bars on the sides, without distorting the picture? How is that possible? - 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

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

Is it an issue that our current movies are mastered at 1080p or 4K when screen resolutions keep increasing? - Quora

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

Why do movies have 'wide screen black bars' when TVs are all 16:9? - Quora

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

What are the most common screen resolution sizes? - Quora

Do old movies look better in 4k? - Quora