YouTube Guide: Shorts, Long-Form Video and Best Practices

3-minute Shorts, long-form video, titles, thumbnails, chapters and recommendations: a verified YouTube guide for brands.

Published on September 23, 2026 · Social platforms

YouTube is both a social network and a search engine. A well-titled video can keep getting found for years, while a post on most other networks fades within days. For a brand, YouTube runs on two complementary formats: Shorts, short and vertical, to get discovered, and long-form videos to explain, demonstrate and persuade. This guide covers specs verified in YouTube's Help Center and developer documentation, what YouTube says about its recommendations, and a practical approach to both formats.

Shorts

Since October 15, 2024, square or vertical videos up to 3 minutes long are categorized as Shorts, according to YouTube's Help Center. A video uploaded in horizontal 16:9 won't become a Short, however brief it is. For Shorts, full-screen 9:16 is the natural choice.

Shorts drive discovery: they show up in the Shorts feed for people who don't know your channel yet. What works: one idea per Short, an instant hook, a format that makes sense with the sound off, and an ending that makes people want to watch the related long video or subscribe.

Long-form videos

By default, YouTube lets you upload videos up to 15 minutes long. Verified accounts can upload longer videos, up to 256 GB or 12 hours, whichever comes first, per the Help Center. If you plan to publish long formats, get your account verified before you need it.

For a brand, long-form is the format for demos and complete answers: product tutorials, comparisons, a method explained step by step, case studies, a webinar reworked for YouTube.

Chapters

Chapters split a video into clickable sections. Per YouTube's Help Center, the first timestamp must start at 00:00, you need at least three timestamps in ascending order, and each chapter must be at least 10 seconds long. On longer videos, chapters help viewers jump to the part they care about.

Titles, descriptions, tags and hashtags

The YouTube Data API documentation sets these limits: titles up to 100 characters, descriptions up to 5,000 bytes, and tags capped at 500 characters combined. Note that the description limit is measured in bytes, not characters, so accented and non-Latin characters use more of it. Neither the title nor the description can contain "<" or ">".

For hashtags, the Help Center spells out two rules: if a video has more than 60 hashtags, YouTube ignores all of them; and up to three hashtags, the ones YouTube considers most engaging, may appear by the title. Two or three relevant hashtags are plenty.

Thumbnails

The thumbnail often decides the click. According to YouTube's Help Center, recommended resolution goes up to 3,840 × 2,160 pixels for videos (16:9) and 2,160 × 3,840 for Shorts (9:16), with a minimum width of 640 pixels, in JPG or PNG. Maximum file size is 2 MB for video thumbnails uploaded from mobile, and 50 MB from desktop.

What YouTube's recommendations reward

YouTube laid out how its recommendation system works on its official blog. The signals it names are clicks, watch time, survey responses, sharing, likes and dislikes. The post also explains "valued watch time": time spent on videos that viewers rate as satisfying when surveyed.

That has a real consequence. A title or thumbnail that overpromises may win the click but not the satisfaction, and YouTube aims to recommend videos people are glad they watched. The right habit: a clear title that says exactly what viewers will learn or see, a thumbnail that matches it, and a video that delivers on the promise quickly.

How views are counted has changed

Since March 31, 2025, a Shorts view counts as soon as the Short starts to play or replay, with no minimum watch time, according to TeamYouTube's announcement. The previous metric is now called "engaged views." In 2026, YouTube extended the rule to every format starting August 24, 2026: a view counts from the very first frame. When you judge performance, look at watch time and engaged views, not just the view count.

From one long video to several Shorts

A well-built long video usually contains several moments that stand on their own: a tip, a result, the answer to a common question, a surprising before-and-after. Each of those can become a Short. Crop it to vertical, keep the subject centered, add on-screen captions for people watching without sound, and trim it so the key moment arrives in the first seconds.

This approach works in both directions. Shorts bring new viewers to your channel, and the long video gives the curious ones somewhere to go deeper. Title each Short for what it shows, not for the long video it came from, and mention in the description where the full version lives.

Plan this at the shooting stage. If you know you'll cut Shorts from a video, film key moments with enough space around the subject to allow a vertical crop, and deliver important lines as complete sentences that make sense out of context.

How often to post

YouTube doesn't prescribe an ideal frequency. A realistic setup for a brand: one long-form video on a regular schedule, monthly or every other week for example, plus several Shorts that pull its best moments or answer one-off questions. Consistency gives viewers a reason to come back, and the quality of each video matters more than how many you put out.

Common mistakes

1. A Short uploaded in 16:9. It won't be categorized as a Short. Shoot or crop vertical.
2. A Short over 3 minutes. Past that, it's no longer a Short.
3. A 20-minute video on an unverified account. Uploads are capped at 15 minutes by default.
4. Clickbait titles. They can attract clicks but hurt satisfaction, which YouTube takes into account.
5. An empty description. It's valuable space to describe the content and add links and chapters.
6. Dozens of hashtags. Over 60, YouTube ignores them all.
7. Broken chapters. Without 00:00 first or with fewer than three timestamps, they won't show.
8. Judging a video on view count alone. After the counting changes, watch time tells you more.

Measuring what works

Since a view now counts from the first frame, the view count alone says less than it used to. Look at average view duration, engaged views and the share of viewers who keep watching past the opening. For long videos, check where viewers drop off: a steep fall in the first seconds usually points to a mismatch between the title, the thumbnail and the actual opening.

Pre-publish checklist

• Short: vertical or square, 3 minutes max, instant hook.
• Long-form: 15 minutes max if the account isn't verified.
• A clear title of 100 characters or less that describes what viewers will see.
• A written description under 5,000 bytes, with chapters for longer videos.
• Thumbnail at 16:9 or 9:16, at least 640 pixels wide, consistent with the title.
• Two or three relevant hashtags.
• Chapters: 00:00 first, at least three, each at least 10 seconds.

YouTube in your content plan

YouTube rewards thinking in series: a core video, Shorts that point to it, and posts on other networks that spread the word. With Oposto, you describe your brand once: it learns your voice, products and audience from your website, prepares short videos in the right format, plans your campaigns in a calendar and publishes to YouTube and the seven other networks at the scheduled time. Then it measures real performance and reuses what works.

To see next month's content ready for review, try Oposto: describe your brand once, it prepares a month of content in the right format for each network, and you approve.