NVIDIA/cosmos ? reverse-engineered prompt

Build me a clean, easy to use project for NVIDIA Cosmos that lets me try the main things this repo promises, especially generating a first video, running visual reasoning on images or video, and exploring the cookbook notebooks.

I want a simple home page or landing notebook that points me to the right path depending on what I want to do, with clear buttons or links for video generation, reasoning, serving an API, and evaluation. Make the first run feel straightforward, with obvious setup instructions, example prompts, and a working end to end demo that shows the model producing a video from text.

If it helps, use the current docs online and keep everything aligned with the Cosmos 3 examples in the repo. Please make the experience polished and beginner friendly, so someone with only light technical experience can clone it, follow the steps, and see something working quickly.