It's a visual technique library for the creative industry. Ad-folk, Directors, Cinematographers, Editors, and Creatives in general. It's a compilation (library) of all the best techniques categorized by type.
That isn’t at all obvious from the frontpage.
You probably want to keep the design lean, so just a simple “about” in small font would help to explain.
The autoloading is also problematic on mobile/tablet but others already chipped in with solutions.
It was obvious to me. On desktop, the top of the page lists categories. The content below is everything inside that category.