eli5 if my monitor is 1080p why does 4k look better than 1080p videos?

Question

shouldn’t 1080p and 4k have no difference if my monitor is only capable of displaying 1080p

In: 422

Answer 1

Most of it stems from chroma subsampling used to reduce the bandwidth needed – a detailed explanation is e.g. provided in [Why Does 4K Look Better on 1080p Monitors?](https://youtu.be/kIf9h2Gkm_U)