Chrome Extension That Summarizes YouTube Comments

Get an AI-powered summary of any YouTube video's comment section in seconds.

ai-toolsintermediate#youtube#ai#summarization
PlugThis prompt
Build a Chrome extension called "YouTube Comment Summarizer" that summarizes the comments section of any YouTube video. The extension should: (1) inject a "Summarize Comments" button next to the like button on YouTube video pages, (2) when clicked, scrape the top 100 comments from the page (loading more by triggering scroll if needed), (3) send the comment text to OpenAI GPT-4 with a prompt to identify: main themes, common questions, criticism, praise, and any controversial topics, (4) display the summary in an overlay panel with sections for each theme, (5) cache summaries in chrome.storage keyed by video ID so re-clicks are instant. Permissions: storage, activeTab. Host permissions: https://www.youtube.com/*, https://api.openai.com/*. Manifest V3 with content script.

What this extension does

Summarizes the comments section of any YouTube video. Identifies main themes, common questions, criticism, and praise. Caches summaries per video so repeat views are instant.

How it works

A content script detects YouTube video pages and injects a "Summarize Comments" button. On click, it scrapes the top 100 visible comments by scrolling the comments container, sends them to GPT-4, and renders the structured summary in a panel.

Permissions used: storage, activeTab

Host permissions: https://www.youtube.com/*, https://api.openai.com/*

Who builds this

For viewers who want to gauge community reaction to a video without reading 1000s of comments. Useful for educational content, reviews, controversial topics, and tutorial videos with helpful comment threads.

How to build it in 3 minutes

  1. Sign in to PlugThis and open the chat input.
  2. Copy the prompt above and paste it into the chat.
  3. PlugThis generates the full Manifest V3 extension in 60-90 seconds.
  4. Download the zip, extract it, and load it via chrome://extensions developer mode.

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Paste the prompt above into PlugThis and ship your extension in 3 minutes.