Why it worked
The slideshow format allows for a high-volume, rapid-fire display of multiple products, which is highly effective for fashion hauls where the viewer wants to see variety quickly.
Product placement
Zara: The brand is the subject of the video. It ACTS as the source of all clothing items shown, which are being modeled and presented as a 'new in' haul. Removing the brand name would change the nature of the video from a brand-specific haul to a generic one.