Summarize Any YouTube Video Without Watching It

A quick look at the YouTube Summary browser extension built by Glasp — and how to turn a long video into a short read.

Tool

YouTube Summary by Glasp.co

Browsers

Chrome or Safari

AI models

ChatGPT or Claude

Cost

Free for now

How It Works, Step by Step

Go to the site made by Glasp.co and pick the browser you want to install the extension on.

Install it on Chrome or Safari — either browser works.

Open YouTube and hover your mouse over the corner of any video. A ChatGPT logo flashes briefly, showing the extension is reading the video.

On the right side of the screen, look for the panel labeled Transcript and Summary.

Choose View an AI summary — it opens directly inside your ChatGPT account and returns the result instantly.

What the Panel Gives You

Copy the transcript in plain text whenever you want it.

Jump to the current time inside the video.

Generate an AI summary — the option the creator prefers.

Customize the extension by clicking Settings on the video.

Plain-text transcript

Timestamp jump

AI summary

Settings menu

Settings You Can Tweak

AI model — switch from ChatGPT to Claude if ChatGPT is blocked at your school or work.

Language — change the output language.

Prompt — edit the default instruction however you like.

Extra options — examples for longer videos or articles, plus keyboard shortcuts.

“Summarize the following transcript into five bullet points.”

The default prompt

The Payoff

15 minutes → 5 bullet points

In the demo, a 15-minute video was condensed into a brief set of five bullets — a 15-minute time saving.

Try It Yourself

Action Steps

Install the YouTube Summary extension from Glasp.co, the Chrome store, or the Safari store.
Open any long YouTube video and hover over the video corner to confirm the extension is active.
Hit View an AI summary and read the five bullet points instead of watching.
If your network blocks ChatGPT, switch the model to Claude in Settings.
Rewrite the prompt when you need a different format, such as notes for longer videos.

Bottom Line

A free, lightweight extension that reads the transcript for you and hands back a short summary — a simple way to save time on videos you don’t need to watch in full.

YouTube Summary with Glasp — Quick Notes