As I understand it is mockup of front page where materials are grouped by categories: Music Video Tv If we go to a category page, we see the materials in this category. Should also be sorting by subcategory: Comedy Classic Modern Is this right?
Yes. This is the front page. At the top is main menu. Click on these buttons will go to their own facet based pages, like your work on Craft. Second line is sub menu. Click on them will use frontpage layout to show the nodes which belong to subcategories. I think it is using rewrite function on the frontpage. The fields in one node should be title, image, category or subcategory, body. When you click on the field 'category' or 'subcategory', it will also go to a facet based page.