Preview is a browser add-on and tool called "Preview" developed by sejong.parkIt is a free service that utilizes ChatGPT to summarize YouTube content. With Preview, users can save the summaries they want to keep and easily categorize them on the main page for future reference.

The main feature of Preview is its ability to provide concise summaries of YouTube videos. This can be incredibly useful for users who want to quickly grasp the content of a video without having to watch the entire duration. By utilizing ChatGPT, Preview is able to generate accurate and relevant summaries that capture the essence of the video.

Additionally, Preview allows users to save the summaries they find valuable. This feature enables users to easily revisit and review the saved summaries at any time. By categorizing the saved summaries, users can efficiently organize and locate specific summaries based on their interests or needs.

Overall, Preview offers a convenient and efficient way to summarize YouTube videos, making it easier for users to consume content and save valuable information for future reference.