YouTube Video Summarizer

How to summarize a YouTube video

1. Copy the link. On the YouTube website, copy the address bar or use Share → Copy link. In the app, tap Share under the video and choose Copy link. youtu.be and Shorts links work too.
2. Paste it above and press Go. The video card appears with the title, channel and length.
3. Open the Summary tab and pick a style. TL;DR, key points or chapters. If the video has captions the summary starts streaming in within a few seconds; otherwise the audio is transcribed first, which takes up to a minute.
4. Read, copy or switch styles. Each style is written separately, so you can read the TL;DR first and ask for chapters only if it looks worth it.

The three summary styles

• TL;DR. A short paragraph. What the video is about, what it concludes, and who it is for. Use it to decide whether to watch at all.
• Key points. A list of the main claims, steps or arguments, in the order they come up. Use it for tutorials, product reviews, lectures and any video you would otherwise take notes on.
• Chapters. The video split into sections, each with a heading and a few sentences on what it covers. Use it for long interviews, podcasts and conference talks, where you want to jump to the part that matters.

The style is a genuine difference in what gets written, not the same text at three lengths. A chapter summary of a two-hour podcast can run to several hundred words; the TL;DR of the same episode is four sentences.

How the summary is made

Everything starts with the transcript. For most YouTube videos that is the caption track, either written by the creator or generated by YouTube. For videos with no captions we fetch the audio and run speech-to-text. The transcript tool shows you exactly that text, timestamps included, if you want to see what the summary was written from.

A language model then reads the whole transcript and writes the summary in the style you chose. The text streams onto the page as it is written, so a long video does not leave you staring at a spinner. Once a summary exists for a video in a given style it is stored, and anyone who pastes the same link gets it immediately, without using a model run or their daily allowance.

What it gets wrong

Knowing the limits makes the tool more useful, not less:

• It cannot see. Slides, code on screen, charts, product shots and gestures are invisible to it. A cooking video whose narration is "then do this" summarises badly.
• It inherits caption errors. Automatic captions mishear names, numbers and jargon, and the summary repeats them confidently. Creator-written captions give much better results.
• Speakers blur together. In a debate or interview the transcript rarely says who is talking, so a claim may be attributed to the wrong person or to nobody.
• It flattens tone. Sarcasm, hedging and "I used to think this but changed my mind" can come out as plain assertions.
• Sponsored segments and intros sometimes end up in the key points because they are, technically, in the transcript.

Treat the summary as a map of the video, then use the transcript's timestamps to verify anything you plan to quote or act on.

Long videos

The best case is a long video with captions: a three-hour lecture summarises into chapters in about the time it takes to read them. Guests and free accounts can summarise videos up to 30 minutes long; Pro raises the limit to four hours. Without captions, the audio has to be transcribed first, and that step is capped at 30 minutes on every plan because speech-to-text is far more expensive than reading captions.

Live streams are not supported, and a stream that has just ended may not have captions yet; try again after YouTube has processed it.

Public video pages

Every video you paste gets a page at its own address with the title, thumbnail, transcript and whatever summaries have been written for it. That page is public by default: it is how the same summary can be served instantly to the next person, and it means you can send a colleague a link to the summary rather than pasting text. If you would rather keep a video's page to yourself, sign in and set it to private from your dashboard.

What people use it for

• Triage. Ten tutorials on the same topic, one afternoon. Read ten TL;DRs, watch one.
• Lectures and courses. Key points as a starting outline for your own notes.
• Podcasts and interviews. Chapters to find the twenty minutes you actually care about.
• Meetings and webinars uploaded as unlisted videos, so the people who missed them can catch up in a paragraph.
• Research. A quick read of what a long panel or hearing covered before committing to the transcript.

When something goes wrong

• "That does not look like a supported link." Use the full video address, for example https://www.youtube.com/watch?v=abc123xyz45. Playlists and channels are not videos.
• "This video is unavailable" or "private." Only public videos work, and only what YouTube shows a signed-out visitor. Age-restricted videos and live streams are excluded.
• The summary is thin or off-topic. Usually the transcript is the problem: a music video, a silent screen recording or a heavily accented recording gives the model little to work with. Open the Transcript tab to see what it saw.
• "YouTube is rate-limiting us." Wait a moment and try again; it usually clears within a minute.
• You hit today's limit. Summaries and transcripts share a daily allowance. Sign up to raise it, or see pricing for Pro.

The same page also downloads

The Download tab saves the video as an MP4 in your choice of quality, or just the audio as an MP3, if the summary convinces you the video is worth keeping. Rights holders can use the DMCA page to request removal of a public video page.