Generate a clean product-focused video — less presenter, more product. For ExampleAgency clients
selling physical products (retail, food, beauty, fashion). The product is the hero.
Use when: "/lm-product-showcase", "product showcase video for [client]", "show the product
itself for [project]", "clean product highlight for [thing]".
Chains: higgsfield-product-photoshoot (still) → marketing_studio_video (product_showcase mode) → ffmpeg.
Output: 8s 16:9 MP4 + 9:16 vertical crop.