YouTube SEO Checklist

How it works

Only the link is processed, and only by pattern. The address is parsed, the host and path are checked against the forms YouTube uses, and the eleven-character video id is pulled out and rebuilt into one canonical address.

Accepted hosts are youtube.com, www.youtube.com, m.youtube.com and youtu.be. Accepted paths are /watch?v=, /shorts/, /embed/ and /live/, plus the short youtu.be/ form. The id must be exactly eleven characters from A–Z a–z 0–9 _ -; a truncated id is rejected rather than guessed at. Timestamps, playlist parameters and tracking parameters are discarded, which is a convenient way to get a clean link to share.

Two things get rejected that look fine at first glance. A link with no scheme — youtube.com/watch?v=… copied out of an address bar — fails, so include https://. Channel, playlist and search pages fail too, because they have no single video id. Anything rejected shows the message Enter a valid YouTube video URL.

What to review, and why

YouTube does not publish how it ranks or recommends videos, so nothing below is a ranking trick. Each point is about something a viewer or a search tool can actually see, and each one you can judge for yourself in a minute.

Title

• Front-load it. Titles are shortened in sidebars, search results and on narrow phone screens, and you cannot control where the cut falls — so put the subject in the first few words rather than after a channel name or a hook.
• Use the words a viewer would type. If people say “sourdough starter not rising”, that belongs in the title; your internal project name does not.
• Make it true, and make it distinguishable from your other videos. A title that promises more than the video delivers buys one click and loses the viewer; “Part 4” tells a browsing viewer nothing about what part 4 covers.

Description

• The opening lines are the only part shown before “Show more”, and they are what gets pulled into previews when the video is shared. Say what the video is and who it is for there — not “Welcome back to the channel”, and not your links.
• Write the next paragraph as prose a person would read. A pile of comma-separated keywords helps nobody and reads as spam.
• Put links, affiliate disclosures, gear lists, credits and social handles below that. Check that every link still resolves.
• If the video mentions a specific tool, version, model or recipe, name it in the description. That is the detail people search for and the detail they come back to the description to find.

Thumbnail

• Judge it at the size it will be seen: a sidebar suggestion on a phone, not full width on your monitor. Shrink it and look again.
• One subject, large. If there is text, keep it to a few words — the title is already next to it, so repeating the title wastes the space.
• Line it up against your own recent thumbnails. If three of them look alike, a returning viewer cannot tell which they have already watched.
• Make sure it matches the video. A frame from a moment that is not in the video is the easiest way there is to lose trust.

Chapters

• Worth adding when the video has distinct parts a viewer might jump between — a tutorial, a review with sections, a long interview. Skip them on a short, single-idea video.
• Name each chapter by what happens in it, not “Intro / Part 1 / Part 2”. The names are the value.
• Check that the timestamps are accurate after any re-edit. Stale chapters are worse than none.

Captions and subtitles

• Automatic captions are a starting point, not a result. Read them through and correct names, numbers, product names and jargon, which is exactly what speech recognition gets wrong.
• Captions are what make a video usable for deaf and hard-of-hearing viewers, and for anyone watching with the sound off. If you add translated subtitles, have someone read them: a machine translation of an uncorrected transcript compounds both errors.

End screens and playlists

• Point an end screen at one specific next video, chosen because it answers the question this video raises. A grid of four options is a decision the viewer will not make.
• Leave room for it. If your last seconds are a full-frame shot or your own sign-off card, the end screen covers them.
• Add the video to a playlist, and put it in the position where it makes sense to watch. A playlist gives a viewer a reason to keep going and gives the video a second route to be found.
• Give playlists real titles and descriptions. They are pages in their own right, and an untitled playlist helps nobody.

Common mistakes

• Treating tags as the main lever. They are a small signal at best; the title, description and thumbnail are what viewers actually see.
• Repeating a keyword across the title, description and tags. It makes the description unreadable, which costs you the one thing the description is for.
• Publishing and never going back. Titles, descriptions, thumbnails, chapters and captions can all be edited later, and an old video with a clearer title can start finding viewers again.
• Changing six things at once. Change one, wait for enough impressions to mean something, then look at the numbers in Studio.
• Reading click-through rate on its own. A thumbnail that attracts the wrong audience raises clicks and drops retention; the two numbers only make sense together.

Limits

• It makes no network request to YouTube. It cannot see the video's title, description, tags, thumbnail, captions, chapters, comments or publish date.
• There is no score, grade, ranking estimate or competitor comparison, because none of those can be calculated from a URL.
• It does not do keyword research and cannot tell you search volume or how contested a phrase is.
• The id check is a pattern match: it confirms the shape of a YouTube id, not that a video exists behind it. A well-formed id for a deleted, private or unlisted video is still accepted.
• For impressions, click-through rate, average view duration and retention, use YouTube Studio. Those are only available to the account that owns the video.

Questions