Here is an example of a scrollable data table with vertical and horizontal scroll and a fixed header. Data design: https://www.sketchappsources.com/free-source/3706-datatable-with-horizontal-scroll-sketch-freebie-resource.html

2 types of modals / popup examples

Parallax Effect

Netflix Desktop UI Sketch Resource Design: https://www.sketchappsources.com/free-source/3590-netflix-desktop-ui-sketch-freebie-resource.html