チャットキャッチャー is a Chrome extension that highlights important messages, specifically moderator messages, in YouTube stream chats and gathers them into a separate window. This extension is designed to help users keep track of important conversations in fast-paced chat environments during livestreams.

To use チャットキャッチャー, simply click on the extension icon, and the "Important Messages" window will open. All important messages will be collected in this window. It is important to note that if you close or refresh the window, the messages will be deleted. This extension is compatible with both livestreams and archived videos.

Overall, チャットキャッチャー provides a convenient solution for users who want to stay updated on moderator messages in YouTube stream chats. With its simple interface and easy-to-use functionality, it enhances the chat experience and ensures that important messages do not go unnoticed.