How do I summarize a YouTube video?

With the Marqly extension installed, open the video on YouTube and select the AI Summary tab on the Marqly card that appears on the watch page. The summary streams in as it’s generated: a TL;DR at the top, key sections that map the video’s structure, and any books mentioned in the video. You get the substance of an hour-long video in about a minute of reading.

What the summary includes

• TL;DR — the video’s core points in a few sentences, so you can decide fast whether it deserves your time.
• Key sections — what the video covers and in what order, useful for jumping straight to the part you care about.
• Books mentioned — titles referenced in the video, pulled out so a good recommendation doesn’t vanish into a 40-minute talk.

Built from the transcript, not the title

The summary is grounded in the video’s own transcript — what’s actually said, not what the thumbnail promises. If a specific claim or number in the summary matters to you, switch to the Transcript tab and check it against the source without leaving the watch page. For the honest version of what AI summaries can and can’t do, see how accurate AI summaries are.

Going deeper than the summary

A summary answers “what is this video about?” When you have a more specific question — “what does she actually say about retention?” — the Chat tab on the same card answers it from the transcript (a Pro feature). And if the video is worth keeping, the Marqly bookmark button in YouTube’s action row saves it to your library with the transcript attached, so it stays searchable later.

For a full walkthrough with examples, read summarize YouTube videos with AI.