YouTube Summarize Sidebar (Chrome Extension)

🚀 Main Features & Characteristics

1. Generate and copy summary prompts with one click
   * Automatically adds a "✨ Run Summary" button within YouTube's three-dot menu ("More actions").
   * Identifies the URL of the clicked video and copies the 以下の動画を要約: https://www.youtube.com/watch?v=... prompt to the clipboard.
2. Seamless integration with Chrome's native Side Panel
   * Launches Gemini (https://gemini.google.com/app) as a native Chrome side panel on the right side of the YouTube screen.
   * Allows you to view summaries in parallel while watching videos without disrupting YouTube's video layout or scrolling operations.
3. Automatic prompt pasting & auto-sending (execution)
   * Detects the input field of Gemini displayed in the side panel, automatically inputs the prompt, and auto-clicks the send button.
4. Compatible with the latest YouTube UI (ViewModel / Lit)
   * Automatically distinguishes between YouTube's old and new UI structures and adds menu items that blend naturally with the design.

🛠️ Installation & Usage

1. Loading the extension (Developer Mode)

1. Open Google Chrome and enter chrome://extensions in the address bar to access it.
2. Enable (turn on) "Developer Mode" in the top right of the screen.
3. Click "Load unpacked" in the top left of the screen.
4. Select the directory of this repository (yt-summary-ext).

2. How to use

1. Access YouTube.
2. Click the three-dot menu (︙) on the top page, search results, channel page, or video playback page.
3. Click "✨ Run Summary" added to the menu.
4. A side panel opens on the right side of Chrome, Gemini launches, and the video summary is automatically executed.

Note Make sure you are logged in to Google Gemini with your Google account in the browser beforehand.