Short answer: the first lines of a YouTube description tell viewers what the video covers, and chapters split a long video into titled parts. Put your main keyword in the title and the description in natural wording, start the first timestamp at 00:00, list at least three chapters and keep each one at least 10 seconds long. Those rules appear on YouTube Help pages. Anything beyond them is labeled "practical suggestion" in this guide and carries no ranking promise.
This guide is for brands, trainers and creators who publish explanatory video. For the wider picture of video search, see our video SEO and YouTube guide. This page stays on descriptions and chapters only.
What viewers see before "Show more"
YouTube's tips for video descriptions (Opens in a new tab) page treats a description as two layers: the part visible straight away and the part that opens on demand. The page asks you to use the first few lines to describe the video. It gives no character count for the visible part. That length depends on the device and the screen width anyway, so the safe habit is to put the most important sentence first and make the first two or three lines readable on their own.
One description per video
YouTube recommends a unique description for each video and says this helps the video be found and stand out from similar ones. Pasting the same block into every upload does the opposite, because the differences between videos vanish. Keep shared channel text near the bottom and reserve the top for the video itself.
Opening lines: what they must say
A viewer meets a video in search results, in suggestions or on the watch page. The title and thumbnail attract attention. The opening lines of the description answer the quiet question: is this what I came for? A strong opening names what the viewer will learn, who it helps and what they will be able to do afterwards.
Example scenario: a bicycle repair channel publishes a video titled "How to fix a slipping gear". The opening line reads: "A step-by-step fix for a rear derailleur that skips under load, from checking cable tension to the final indexing test on the stand." The viewer understands the scope without expanding anything.
The opening should not repeat the title. The title says what the video is. The opening says what it covers, in what order and for whom.
Documented limits versus silence
The page is silent on some topics. Treating silence as a rule would be a mistake, so the table separates the two.
| Topic | On the YouTube Help page |
|---|---|
| Maximum length | 5000 characters |
| Visible line count | No number given; "first few lines" |
| Keywords | Choose 1-2 words that describe the video and feature them in title and description |
| Uniqueness | Each description should be unique |
| Formatting | Bold, italic, strikethrough and bullet lines starting with a symbol and a space |
| Hashtag rules | Not addressed on this page |
| Preview | Preview in search, on the watch page and on different mobile devices |
When a row says "not addressed", look for another official page rather than inventing a rule.
Writing the main keyword into a description
The page gives a plain method: pick one or two main words that describe the video and feature them prominently in both the title and the description. It does not recommend a density or a repeat count. Without such a rule, the sensible test is whether the sentence still reads well to a person.
Where the real search terms come from
The page names two research sources, the Research tab in YouTube Analytics and Google Ads Keyword Planner. It also suggests checking the report on how viewers find your videos and adding the search terms people really use to the description if they are missing. If your interface is not in English, menu names may look different.
Most channels skip that last step. Using the viewer's words instead of your own guess makes the description match real searches. Practical suggestion: once a month, open the ten most watched videos, read the search terms and check whether the description uses any of them in a sentence that makes sense.
Alternative names for the same topic
The help page points to research tools for popular keywords and synonyms. Many topics have more than one common name: "description" and "summary", "chapters" and "timestamps", "tutorial" and "lesson". Using one in the title and another in the description gives natural variety. The goal is that the viewer finds the video whichever word they type.
Stacked keyword or natural sentence
Example scenario: a language teacher uploads a video on "past tense for beginners". The main keyword is "past tense for beginners".
| Weak version | Stronger version |
|---|---|
| "Past tense past tense for beginners learn past tense easy past tense lesson." | "This lesson introduces the past tense for beginners with ten everyday verbs, a short drill and the three mistakes learners make most often." |
| The keyword is stacked and the sentence says nothing | The keyword sits inside a sentence that tells the viewer what is on offer |
The second version serves both people and search. The first helps neither and makes a visitor doubt the channel.
Keyword questions to answer on upload day
- Does the main keyword appear in the title and in the first sentence of the description?
- Does the sentence still make sense if you remove the keyword?
- Is any word repeated three times in a row?
- Does at least one term viewers actually search appear in the text?
- Is the description a copy of another video on the channel?
- Do the first lines still make sense in the mobile preview?
Chapters: what YouTube requires
Chapters divide a long video into titled sections. According to YouTube's video chapters (Opens in a new tab) page, each section gets its own preview and viewers can rewatch parts easily. Chapters may also show up in transcripts. To add them yourself you place a list of timestamps and titles in the description.
What YouTube requires of a chapter list
The page states three conditions that are clear and testable:
- The first timestamp must start at 00:00.
- The video needs at least three timestamps in ascending order.
- Each chapter must be at least 10 seconds long.
The page does not give a detailed formatting example beyond asking for a list of timestamps and titles. In practice each line holds the timestamp followed by the title. Limits on help pages can change, so check the current page before you rely on a number.
When YouTube adds chapters for you
The page says YouTube can generate chapters automatically for some videos. The option is ticked by default on new uploads, but it is not guaranteed: not all videos are eligible and not every eligible video receives them. Automatic chapters are not offered if the channel has active strikes or if the content may be inappropriate for some viewers. Timestamps you add yourself override automatic chapters.
To turn them off for one video, the page describes this route: in YouTube Studio open Content, open the video, click "SHOW MORE", untick "Allow automatic chapters" and click "SAVE". For all uploads, go to Settings, Upload defaults, Advanced settings and untick "Allow automatic chapters (when available and eligible)". If your interface is not in English, menu names may look different.
Chapter list for a home brewing video
Example scenario: a coffee roaster publishes a 21-minute video on home brewing.
| Time | Title |
|---|---|
| 00:00 | What this video covers |
| 01:20 | Choosing grind size |
| 05:45 | Water temperature and ratio |
| 11:10 | Pour-over step by step |
| 16:30 | Fixing sour or bitter cups |
| 19:50 | Quick summary |
Titles should be short, specific and clearly different from each other. "Part 1" and "Part 2" tell neither the viewer nor a search system anything.
Questions for your own chapter list
- Does the list start at 00:00?
- Are there at least three timestamps, in order?
- Is every chapter at least 10 seconds long?
- Does each title say what the section contains?
- Does each timestamp land on the right moment in the video?
- If automatic chapters are on, do you know your own list replaces them?
How often should a chapter start
Editors keep asking how many minutes should pass between chapter marks. The help page gives no interval, only the 10-second minimum, so a fixed "every two minutes" rule has no documented basis.
Choosing chapter points by topic
Practical suggestion: decide by topic change, not by the clock. Add a chapter wherever the subject, the question being answered or the demonstrated example changes. Apply it like this:
- Watch the video once and mark every topic shift.
- Ask whether a viewer would want to jump straight to this part. If yes, make it a chapter.
- If two marks are less than about half a minute apart, consider merging them. That figure is a readability instinct, not a documented limit.
- If a single chapter covers most of the video, look for sub-topics inside it.
A short tutorial may do well with three chapters, while a long lesson can carry eight or ten. The test is whether a viewer can find their way, not whether you reached a number.
Chapter list errors and repairs
| Mistake | Problem | Fix |
|---|---|---|
| A chapter every 20 seconds | The list grows long and titles blur | Merge by topic |
| One chapter of 18 minutes | No navigation value | Split by sub-topic |
| Titles like "Part 3" | Says nothing to viewer or search | Name what the section does |
| Wrong timestamps | Viewer lands on the wrong moment | Click every timestamp before publishing |
Spotting topic changes in recordings
Edit notes are a good source: a change of screen share, a new demonstration or a switch of speaker usually marks a chapter. In a recorded panel each speaker change is a candidate. In a webinar, the question and answer part deserves its own chapter so viewers can jump to it. The same idea of reusing recorded sessions appears in podcasts, webinars and guest appearances for brand and links.
Links in descriptions and the channel profile
The lower part of a description suits links, but YouTube sets rules for them. The sharing links with your audiences (Opens in a new tab) page covers the main points.
Clickable or not
According to the page, adding clickable external links in long-form video comments and descriptions requires your channel to have access to advanced features enabled. URLs placed in YouTube Shorts comments and Shorts descriptions are non-clickable, a measure to reduce spam and scam attempts.
Profile links as a backup
You can show up to 14 links on your channel page. The description tips page also recommends channel profile links for the important links you want to showcase. Which profile links appear and how to update them is covered in a separate help article.
A sentence beside each link
When the video points to a page, add a short sentence beside the link that explains what the viewer will find. A bare address is harder to trust than "The checklist used in this video". Visual material in paid placements is covered in images and video in sponsored posts. For realistic expectations about shares and mentions, read do social signals help SEO and backlinks. A link in a description is not a ranking promise.
Destinations YouTube does not allow
External links to sites with content that violates YouTube's external links policy are not allowed. Check the destination before you paste it. These pages say nothing more about sponsored or promotional disclosure, so consult the platform rules and your local regulations for that.
Link questions before upload
- Is access to advanced features enabled on the channel?
- Does the destination comply with the external links policy?
- Is there a short sentence next to each important link?
- For Shorts, are you relying on channel profile links instead of description URLs?
- Is the most important link in the first lines and the minor ones lower down?
A default description template
The tips page suggests setting a default description that fills in basic channel information on every upload. It removes repeated typing, but the top of each description must still be written by hand because the unique-description advice should hold.
Fields and who fills them
Practical suggestion: split the template in two. The top holds fields you fill for each video. The bottom holds fixed channel information.
| Field | Who fills it | Example content |
|---|---|---|
| Line 1 | By hand | What the video covers, who it helps, the result |
| Line 2 | By hand | A second sentence with the main keyword |
| Chapters | By hand | A list starting at 00:00 |
| Playlist | By hand | The next video in the series |
| Credits | By hand | Guests, music, thanks |
| Channel intro | Template | One-line description of the channel |
| Links | Template | Website, newsletter, profile links |
Check the preview first
The page asks you to preview the description in search, on the watch page and on a few mobile devices. Do not skip this, because the point where the first lines break differs by device. If the key information falls after the cut, rewrite the sentence.
Upload-day routine
- Write one or two sentences on the topic, audience and result.
- Add the main keyword in a sentence that reads well.
- Paste the chapter list and test each timestamp.
- Add the related playlist.
- Credit collaborators and people who helped.
- Let the default text supply channel intro and links.
The page also recommends playlist links and credits for collaborations and mentions of channels and people who helped. Those lines show the viewer where to go next. For bullet lists, start a line with "*", "+" or "-" followed by a space.
Last yes or no round
| Question | If yes |
|---|---|
| Is the description under 5000 characters? | Good |
| Do the first lines explain the video alone? | Good |
| Are keyword and title aligned? | Good |
| Does the chapter list start at 00:00 with three or more lines? | Good |
| Do links comply with the policy? | Good |
| Was the preview checked? | Good |
Adapting the description to the format
One template does not fit every format. The suggestions below are drafts from practice, not YouTube rules. The official limits and requirements (5000 characters, chapter conditions, link restrictions) stay the same for all types.
For reviews
Here the viewer wants to decide. Say what was reviewed, for which use and how the verdict is organised. Chapters can follow the decision path: features, real use, strengths and weaknesses, verdict. If the channel earns from the product, state the commercial relationship clearly, and follow the rules of the platform and your local regulations.
For tutorials
The viewer wants to solve a problem. The opening line states the problem and how far the solution goes. Each step can be a chapter, so someone stuck on step four can jump there. A short list of tools or materials in the description helps people decide before they press play.
For recorded webinars and panels
Long recordings gain the most from chapters. Every speaker and every question block can be a separate entry. Naming the speakers and their topics in the description fits the page's advice to credit collaborators.
For Shorts
URLs in Shorts descriptions cannot be clicked. In a short video, a clear topic sentence is worth more than a link, and a channel profile link can send viewers on to longer videos. The three-chapter condition and the 10-second minimum may not suit very short videos, so check the current help page before planning chapters for them.
Reading a weak and a strong description side by side
Example scenario: a yoga studio posts an 18-minute video of a morning mobility routine.
| Element | Weak | Strong |
|---|---|---|
| Opening | "New class is up, come practice." | "A gentle morning mobility routine for desk workers: shoulder, hip and spine movements you can do beside the bed, taught step by step." |
| Keyword | Missing | "Morning mobility routine" in title and first sentence |
| Chapters | None | A six-line list starting at 00:00 |
| Links | Ten links in a row | One link to the class schedule plus the profile links |
| Footer | Same long block on every video | Short channel intro and playlist |
The stronger version is longer, but length is not the goal. After the opening, everything follows the order a viewer needs.
Wording a chapter title
Three tests help: the title should contain the question the section answers, it should not force the keyword in, and it should not blur into the neighbouring chapter. "Stretches" is weak. "Three hip movements to do slowly" tells the viewer what to expect. Question titles also work: "Where should I feel this?" Avoid capital-letter strings and decorative symbols, which hurt readability.
After publishing: review and refresh
Writing a description is not a one-off task. Because the tips page points to the report on how viewers find your videos, that report can drive your review cycle. Practical suggestion for a routine:
- Look at how people find the video and note the search terms.
- If a meaningful term is missing, add it to the first two sentences in natural wording.
- Check whether chapter titles match the questions people actually ask.
- Update old links and product details.
- Record the change and its date so you can compare later.
Reviving the archive
Archive descriptions often stay frozen at their first version. Rewriting the first two lines of a few older videos each month, adding a missing chapter list and fixing broken links costs less than producing a new video. Start with videos that still get regular views and have a weak description. Also check whether the content itself is still accurate, because an out-of-date tutorial is not fixed by a better description.
Defining progress
Pick the measure beforehand. A wider range of search terms in the discovery report, more views of mid-video sections, or more viewers reaching the later chapters are reasonable signs. Proving which edit caused which change is hard, so avoid changing many things at once. One change at a time speeds up learning.
Team ownership
On a channel with several uploaders, decide who approves the description. A writer can own the first two lines, an editor the chapters and a channel manager the links. That split reduces mistakes and keeps the template intact.
Related guides: Video and Discover Visibility for Publishers, Video Sitemaps and VideoObject Markup Guide, Large Images for Google Discover.
Conclusion
According to YouTube, a description describes the video in its first lines, is unique and features the main words alongside the title. A chapter list starts at 00:00, holds at least three timestamps and keeps every chapter at least 10 seconds long. There is no official interval for how often to add a chapter, so topic change is the working rule. For links, the channel needs advanced features enabled, and URLs in Shorts descriptions cannot be clicked. None of this promises search or recommendation rankings. The aim is to help viewers find the video and move around inside it.
If writing descriptions and chapter text for every upload is a bottleneck, you can look at the content writing service. Scope and terms are described on the product page.
Frequently Asked Questions
How long can a YouTube video description be?
According to the YouTube Help page, a description can hold up to 5000 characters. The page gives no number for how much shows before the expand control, so put the key sentence first and make the opening lines understandable on their own.
What are the rules for chapters?
The first timestamp must be 00:00, the video needs at least three timestamps in ascending order and each chapter must be at least 10 seconds long. Timestamps you add yourself override automatic chapters. Help page limits can change, so check the current page before you rely on them.
How often should I add a chapter?
The help page gives no interval, only the 10-second minimum. As a practical suggestion, follow topic changes: any part a viewer would want to jump to can be a chapter.
How many times should the keyword appear in a description?
The documentation gives no repeat count. YouTube advises featuring one or two main words describing the video in both the title and the description. Place the word inside a natural sentence and avoid repeating it back to back.
Do automatic chapters appear on every video?
No. The page says not all videos are eligible and not every eligible video gets them. They are unavailable if the channel has active strikes. The option is on by default for new uploads and can be turned off in YouTube Studio.
Can I put clickable links in a Shorts description?
You can type a URL, but URLs in YouTube Shorts comments and descriptions are non-clickable. Use channel profile links instead. For long videos, clickable external links need access to advanced features on the channel.
Does a better description guarantee higher rankings?
No. YouTube Help makes no such promise. Descriptions and chapters explain the video and help viewers move through it. Results depend on competition and viewer behavior.
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