VideoAgain is AI software that analyzes video content to generate production documentation. The software accepts video input from social media platforms like Douyin, Xiaohongshu, and Bilibili, as well as MP4, MOV, WebM, and M4V files up to ten minutes and 500MB. VideoAgain extracts information to create four outputs: chronological plot summaries detailing events, actions, transitions, and dialogue; material prompts for characters, environments, and props; shot-by-shot prompts specifying camera angles, movements, and dialogue; and segmented tasks for longer videos while maintaining continuity. Results are editable, allowing refinement of characters, shots, or dialogue. VideoAgain combines multi-source compatibility with advanced extraction, enabling creators to transform video content into actionable production materials.