# YouTube Video Summarizer for iPhone and iPad > Summarize YouTube videos on iPhone or iPad. SumAI turns any video with captions into key points, chapters, a transcript and an AI chat in seconds. - Source: https://getsumai.app/features/youtube-video-summarizer/ - Last updated: 2026-11-12 - About: SumAI: YouTube & PDF Summary, an AI summarizer app for iPhone and iPad **Skip the video. Keep the point.** SumAI is a YouTube video summarizer for iPhone and iPad. Paste a link, or share a video straight from the YouTube app, and SumAI reads the video's transcript and returns a structured summary in seconds, with chapters, tappable timestamps and an AI chat for follow-up questions. ## Highlights - **An hour, in minutes.** The example on SumAI's App Store page shows a 1 hour 12 minute lecture turned into a 3 minute read. You get the key points first and decide what deserves a full watch. - **Videos, Shorts and live streams.** SumAI summarizes regular YouTube videos, YouTube Shorts and live streams, as long as they have captions or auto-generated subtitles. - **Chapters you can tap.** Every video summary comes with chapters and key moments. Tap a time to jump to that part of the video. [More on key moments](https://getsumai.app/features/key-moments-and-chapters/). - **Questions welcome.** Ask AI answers questions about the video from its transcript and points to the timestamp each answer comes from. [See Ask AI](https://getsumai.app/features/ask-ai-chat/). - **Five depths.** Pick TL;DR, Standard, Detailed, Study Guide or Chapters before you read. [Compare the styles](https://getsumai.app/features/summary-styles/). - **In your language.** Read the summary in any of 60+ languages, whatever language the video is in. [How languages work](https://getsumai.app/features/summarize-in-any-language/). ## What you get from a YouTube summary A SumAI summary is more than a paragraph of text. For every video it gives you: - **A structured summary** in the style you picked, with the key points up front. - **Chapters and key moments** with timestamps, so you can see how the video is laid out. - **The full transcript** with timestamps, ready to copy. - **Ask AI**, a chat that answers questions from the transcript and cites the moment each answer comes from. - **A mind map, a quiz and flashcards** generated from the same content. At the top of each summary you can see how long the read is next to how long the video is, which makes the trade obvious before you start. ## Which YouTube videos work SumAI reads a video's transcript, so the one requirement is that the video has **captions or auto-generated subtitles**. That covers most videos where people are talking: lectures, tutorials, interviews, podcasts, talks, explainers, reviews and news. It also means a few kinds of video will not work, or will not work well: - **Videos with no captions at all.** Music videos, ambient footage and silent demos have no transcript to read. - **Videos where the content is on screen, not in speech.** If a tutorial shows the steps but the narrator never says them, the summary can only reflect what was said. To check quickly, open the video on YouTube and look for the **CC** button, or for a transcript in the description. If either is there, SumAI can work with it. ## When a summary beats watching Summaries are best when your goal is information rather than the experience of watching: - **Triage.** Decide in a minute whether a 90-minute talk is worth your evening. - **Study and revision.** Turn a lecture into a study guide, then test yourself with the quiz. - **Research.** Pull the arguments out of several videos on one topic and compare them. - **Catching up.** Get the substance of an interview or keynote you missed. Watching still wins for anything visual or emotional: a film essay, a cooking technique, a performance. A good habit is to read the summary first, then tap into the two or three key moments that matter. ## Tips for better summaries - **Long video? Use Chapters.** The Chapters style goes section by section and is built for long videos. - **Studying? Use Study Guide.** It organizes concepts, definitions and takeaways. - **In a hurry? Use TL;DR.** One paragraph, just the point. - **Not sure it is right? Check the source.** Tap the timestamp next to a point and listen to the original for ten seconds. SumAI is an independent app and is not affiliated with YouTube or Google. ## How to summarize a YouTube video on iPhone 1. **Copy the video link.** In the YouTube app, tap **Share** under the video, then **Copy link**. Or skip a step: choose **SumAI** in the share sheet and the video opens there directly. 2. **Paste it into SumAI.** Open SumAI, start a new summary and paste the link. SumAI shows the video so you can confirm it is the right one. 3. **Choose a style and a language.** Pick one of the five summary styles, from TL;DR to Chapters, and the language you want to read in. 4. **Read, tap and ask.** Read the key points, tap a key moment to jump into the video, and use Ask AI for anything the summary did not cover. ## Frequently asked questions ### Can SumAI summarize any YouTube video? SumAI can summarize YouTube videos, Shorts and live streams that have captions or auto-generated subtitles, because it works from the video's transcript. Videos with no captions at all, such as music-only clips, cannot be summarized. ### How long does it take to summarize a YouTube video? SumAI is designed to return a summary in seconds. You do not need to play the video first: the app reads the transcript directly. ### Does SumAI work with YouTube Shorts and live streams? Yes. Shorts and live streams are supported alongside regular videos, provided they have captions or auto-generated subtitles. ### Can I summarize a YouTube video in a different language? Yes. You choose the summary language separately from the video's language, from more than 60 options. A video in Japanese can be summarized in English, for example. ### Is SumAI's YouTube summarizer free? SumAI is free to download on the App Store, with an optional Premium subscription billed weekly or yearly as an in-app purchase. The App Store shows the current price in your country. ### Do I need a computer or a browser extension? No. SumAI is a native app for iPhone and iPad, so everything happens on your device: paste or share a link and read the summary there.