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

Can we clearly notice the difference between 4k and full HD (43 inch LG)? - Quora

Is there any website where I can check if a movie was originally recorded in 4k or not? - Quora

How come old films are available as HD videos nowadays? - 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 noticeable is 4K gaming compared to 1080p? - Quora

When you see film or footage that's decades old, it usually looks noticeably lower quality than that of today. With as good as our film quality is these days, will this still

How are they able to upscale old movies to 4k if the cameras back then did not record at that resolution? - Quora

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

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