This PR cleans up the YAML metadata:
- Removes `arxiv:2608.27345` from the tags, as the arXiv ID should only be referenced in the Markdown content.
- Adds `task_categories: image-to-video` to help users find the dataset under the correct task domain.
No content changes are needed because the existing README already contains the paper link, code link, project page, usage instructions, citation, and license information.
