task_categories:video-text-to-text task_categories:question-answering task_categories:visual-question-answering language:en license:apache-2.0 size_categories:100K<n<1M format:json modality:text library:datasets library:dask library:polars library:mlcroissant arxiv:2602.05847 region:us audio-visual video-understanding multimodal reinforcement-learning reasoning