Eli5 how does iPhone video recoded its own screen?! I’m baffled. Not much online about how it works either.

Question

I know how to record the screen. But how does it actually work??

In: 0

Answer 1

Everything you see on a computer screen is rendered by a GPU aka Graphics Processing Unit aka a graphics card.
The commands that are sent to the GPU are recorded, then played back to you in a video format.
Essentially just keeps track of what is being displayed, then formats it into a video.