How do you write a YouTube video description? Put the sentence that confirms the viewer is in the right place into the first 150 characters, then use the space below it for chapters, the two or three links you actually want clicked, and a short block of context for search. A good YouTube video description will not rank a bad video. It decides what your video gets matched against, how easy it is to navigate, and where the attention you already earned goes next.
Most channels treat the description box as a junk drawer. Four affiliate links, a wall of hashtags, and the same paragraph about a Discord server pasted for the four hundredth time.
Then they wonder why the box does nothing.
It does plenty. Just not the thing people hope for. Here are seven rules that make a YouTube video description pull its weight, a template you can copy, and the mistakes worth undoing tonight.
What a YouTube Video Description Actually Does
Three jobs, in rough order of how much they matter.
It gets matched against searches. YouTube is explicit that search results are ranked on how well the title, description and video content match the query, plus which videos drive engagement for that search. Your description is one of three inputs, not a lever.
It makes the video navigable. Chapters turn a 14 minute video into eight things a viewer can choose between. That changes viewer behavior, and behavior is what the algorithm actually reads.
It routes attention. YouTube counts views that arrive from links in a description inside the Suggested videos traffic source, so the links you place show up as a number you can check rather than a hope.
Notice what is missing from that list: tags. YouTube's own guidance calls them "not important" and says they mainly exist to correct common misspellings, like YouTube versus U Tube. If you have been agonizing over tags, move that time to the first two lines of the box.
Rule 1: Win the First 150 Characters
Only the opening lines show before the "...more" link on desktop and the collapsed card on mobile. Everything after that is read by people who already decided to care.
So the first sentence has one job: confirm the viewer landed in the right place, in plain language, using the phrase they would have typed.
Weak: "Hey guys, welcome back to the channel! In today's video we're going to be taking a look at..."
Strong: "A full color grade for underexposed indoor footage, start to finish, with the three sliders that do most of the work."
Same information. One of them wastes the only part anyone sees.
Rule 2: Describe the Video, Do Not Stuff It
Write three to five sentences of real description: what the video covers, who it is for, what the viewer walks away with. Use the natural phrase a person would search, once or twice, then stop.
Keyword stuffing in the box was a 2014 tactic. Today it reads as spam to humans and adds nothing to the match, because YouTube is comparing your topic against the video's actual content, spoken audio included. If you want that comparison to go well, the fastest fix is not more keywords, it is accurate captions on the video itself. That is covered in how subtitles boost YouTube views and watch time.
Rule 3: Add Chapters and Get a Free Table of Contents
Chapters are the highest return thing in the box, and most channels still skip them.
The requirements are strict and easy to fail silently. YouTube needs the first timestamp to start at 00:00, at least three timestamps in ascending order, and every chapter to run at least 10 seconds. Break one of those and the entire chapter list simply does not render.
Name chapters like search results, not like a DVD menu:
- 00:00 Why indoor footage looks flat
- 00:48 Fixing exposure before you touch color
- 03:12 The three sliders that matter
- 07:30 The mistake that makes skin go orange
"03:12 The three sliders that matter" earns a click. "03:12 Part 3" does not.
Rule 4: Put Links Where They Earn the Click
Two or three links, each with a reason to click, placed directly under the description text rather than buried beneath a wall of boilerplate.
A link gets clicked when the reader has just been told why they need it. Immediately after the paragraph that names the problem is the place. Fourteen lines below the hashtag soup is not.
Keep the permanent furniture, socials, gear lists, affiliate disclosures, in one block at the very bottom. It has to exist. It does not have to go first.
Rule 5: Three Hashtags, Not Thirty
The first three hashtags from your description appear above the video title, so choose three a human would actually tap.
Past that they are a liability. YouTube ignores every hashtag on a video that carries more than 60 of them, and its over-tagging policy warns that piling on irrelevant tags can get a video pulled from search results. There is no scenario where hashtag 31 helps you.
Rule 6: Write the Description for the Next Video Too
Your description is the one piece of packaging that can send a viewer to a second video of yours without competing against your own suggested panel.
One line, specific, aimed at the person who just finished watching. "If your audio is the next problem, this is the one on killing room echo for free." Then the link.
That is also how a back catalog starts to earn. A nine month old video with a good internal link is a distribution channel for the thing you published last week, which is the behavior the YouTube algorithm for small channels rewards.
Rule 7: Keep a Template, Stop Starting From Blank
YouTube gives you 5,000 characters in the box. Nobody needs all of them, and nobody should be rewriting the boilerplate half from scratch every upload either.
A YouTube Video Description Template You Can Copy
- Line 1, inside 150 characters: the promise, in the words someone would search.
- Paragraph: three to five sentences on what the video covers and who it is for.
- Chapters: starting at 00:00, three or more, ten seconds minimum each.
- One internal link: the next video, with a reason to watch it.
- Resources: two or three links that belong to this specific video.
- Permanent block: socials, gear, disclosures.
- Three hashtags.
Write the top four fresh per video. The bottom three are copy and paste. That is the whole discipline.
Mistakes That Quietly Cost You Views
Almost every YouTube video description worth fixing has at least two of these in it.
| Mistake | What it costs | Fix |
|---|---|---|
| The same description on every video | nothing matches a specific search | rewrite the top four lines each time |
| "Hey guys, welcome back" as line 1 | the only visible line says nothing | lead with the promise |
| Chapters that skip 00:00 | the entire chapter list fails to render | start at 00:00 |
| Twenty hashtags | no gain, plus over-tagging risk | three |
| Link stack above the description | the reader leaves before the pitch | links after the reason |
| A keyword list at the bottom | reads as spam, adds nothing | delete it |
Where This Fits in the Rest of Your Packaging
The description is the third thing a viewer meets, after the thumbnail and the title. Getting it right is worth a few percent on discovery, which is real but small next to the first two. If your click-through rate is the problem, start with YouTube titles that get clicks and the thumbnail mistakes killing your CTR.
Where a YouTube video description earns its keep is everything after the click: navigation, the next video, and the search you would otherwise never show up for.
And if the harder problem is having nothing worth describing, our free YouTube video ideas generator returns ten concepts with hooks for your niche, on the 500 free monthly credits every Creator AI plan starts with.
