YTSummary is a tool that uses ChatGPT to generate concise summaries of YouTube videos. It helps users save time by extracting key points without watching the entire video. The tool offers multiple modes: Outline Mode for a brief summary with highlights, Mind Map for visual hierarchical representation of key points, and Segment Mode for detailed timestamped summaries aligned with YouTube chapters or fixed intervals. It supports summarizing videos of any length, multi-language summaries, and exporting summaries to various formats. Users can also save their summary history and share summaries with others. The tool is used by students, researchers, marketers, content writers, and YouTubers to quickly grasp video content, conduct research, and stay informed.