Weird background scrolling animation

Do you guys have any ideas on how these dudes made their background: https://www.gothamsiti.it/
It’s look like it just a huge background image and when user scrolls down the camera view is changing - pretty cool idea

I mean, I know that there is probably a lot of code there, but I am still interested. What are the chances that I do something similar on the webflow with almost none code experience :joy:
May be you know something like that on CodePen so I can change a little and add to the website?

Would love to hear you thoughts on this. Appreciate your time