YouTube Video Size in 2026: Every Official Dimension

Every YouTube size in one table

These are the numbers YouTube publishes, checked against its Help pages on 3 September 2026. Each row links to the page it came from.

The two thumbnail rows are not the numbers you will find in most articles about YouTube sizes. That is the next section.

Three specs changed since most guides were written

Shorts length, thumbnail resolution and the banner safe area all moved, and a lot of published advice did not move with them.

Shorts length. Google dates this one: videos uploaded on or after 15 October 2024 that are square or vertical and up to three minutes long are categorised as Shorts. Official Artist Channels moved to the same rule on 8 December 2025.

Thumbnail resolution. The thumbnail page now asks for 3840 x 2160 and says the image "should be as large as possible", because it is also the preview in the embedded player. 1280 x 720 still clears the 640 px minimum width, so nothing breaks. It is simply no longer what YouTube recommends.

Banner safe area. The branding page gives 2048 x 1152 as the minimum upload and 1235 x 338 as the safe area at that minimum. The 1546 x 423 figure still in circulation is not on that page today.

Google does not publish a changelog for the thumbnail and banner revisions, so the honest statement is what the Help page says today, with the date we read it. We read it on 3 September 2026.

Aspect ratio decides whether you publish a Short or a long-form video

Shape is not a styling choice on YouTube. It selects the product, the feed and the revenue share.

The rule, in Google's words: any video uploaded on or after 15 October 2024 with a square or vertical aspect ratio, up to three minutes long, is categorised as a Short. Those are monetised in the Shorts revenue sharing model from the Shorts feed. To keep a video long-form, use a wider ratio such as 16:9.

A 2 minute 40 second vertical cut of a sponsored segment is a Short. The same edit at 3 minutes 10 seconds is a long-form video. Nothing in the upload flow warns you which side of the line you landed on.

Two more limits belong to Shorts specifically:

• Shorts upload at a maximum of 1080p. Filming a Short in 4K is fine, but YouTube caps the upload at 1080p, so the extra resolution buys you cropping room in the edit and nothing on the platform.
• A Short over one minute with an active copyright claim is blocked globally. It will not play, will not be recommended and cannot be monetised until the claim is resolved. Under one minute, the old limits apply.

YouTube also changed how Shorts views are counted on 31 March 2025. A view is now each time a Short starts or replays, with no minimum watch time. The older metric survives in Analytics as "Engaged views" and still governs Partner Programme eligibility and ad revenue share, so the two numbers in your dashboard are not interchangeable.

Three minutes are allowed, and almost nobody uses them

The length limit moved to three minutes in October 2024. Almost two years later the videos being published are nowhere near it.

On 3 September 2026 we opened the Shorts tab of seven large channels, took the ten most recent Shorts on each, and read the duration off every video's own page. That is 70 Shorts published between 1 March and 3 September 2026.

The median ran 43 seconds. Seventy-seven percent came in at a minute or under. Two of the seventy reached 2:58, and nothing at all landed between 1:45 and 2:45.

The habit is not uniform, and the differences track what the channel is for.

A single visual gag runs twenty seconds. A recipe or a build needs longer, and Gordon Ramsay's median is nearly four times Zach King's. Length follows the thing being shown, not the platform's ceiling.

Cadence varies as widely. The NBA's ten most recent Shorts were published across two days. Red Bull's took nine. Gordon Ramsay's span five months. The same format is being used as a daily wire service and as an occasional set piece.

Views do not reward the extra time either. The three most-watched Shorts in the sample, all from MrBeast, ran 51, 51 and 49 seconds, and the largest of them passed 207 million views. Nothing in the sample suggests a longer Short travels further.

What that means for a brief. Three minutes is permission, not a target. Unless the idea genuinely needs the room, write the deliverable as a Short under a minute and spend the argument on the first three seconds instead.

The sample is seven large entertainment, sport, food and brand channels, chosen for output and reach, not drawn at random. It says what big publishers do. It is not evidence about a channel with four thousand subscribers, and it is a snapshot taken in September 2026, which we re-run whenever this page is next updated.

Resolution and aspect ratio are two different numbers

Resolution is how many pixels the file contains. Aspect ratio is the shape those pixels make. 1920 x 1080 is a resolution; 16:9 is its ratio.

The standard aspect ratio on a computer is 16:9, and for that ratio YouTube encodes at these resolutions:

YouTube started removing playback support for resolutions between 4K and 8K in 2022, and names 5K as an example, so an intermediate master no longer buys you an intermediate stream.

Do not add black bars to make a video fit. The player adapts to whatever shape you upload. A 9:16 video on a desktop browser gets padding from YouTube, white by default and dark grey in dark theme. YouTube's own guidance is to avoid adding padding or bars yourself, because baked-in bars stop the player from resizing to the viewer's device. The common belief that wrong dimensions cause black bars has it backwards: the bars appear when you put them there.

You do not have to upload at maximum resolution

YouTube's instruction is to encode and upload at the resolution and frame rate you recorded, not the highest number your editor offers.

The channels with the most to lose follow that rather than a maximum-quality rule. On 3 September 2026 we read the resolutions YouTube actually serves for the eight most recent long-form uploads on the same seven channels. Thirty-eight percent are served no higher than 1080p.

Most of those are simply young. YouTube finishes the higher transcodes after publication, which is why a new upload can look soft for an hour and sharpen later, so a video published this week proves nothing. Three in the sample are not young, and all three are MrBeast:

Videos he published between them, on 16 May and 22 August, do reach 2160p. A transcode still catching up does not explain a four month old video at 1080p sitting beside a three month old one at 4K. The largest channel on YouTube ships some of its biggest videos at 1080p.

So the rule is narrower than "shoot 4K":

• Match the source. 4K footage, 4K upload. 1080p footage, 1080p upload. Upscaling adds file size and no detail, and YouTube will not invent the pixels back.
• Resolution buys bitrate. YouTube's own recommendations jump from 8 Mbps at 1080p to 35 to 45 Mbps at 2160p, so a genuine 4K master does carry more data through the re-encode. That is the reason to shoot 4K, not a ranking effect.
• Archive footage is fine as it is. A tape transfer, a 720p clip, a phone video from 2014: upload it at what it is. Nothing YouTube publishes requires a minimum resolution, and the first video ever uploaded to the platform is still served at 240p.

Thumbnails: 3840 x 2160 for video, 2160 x 3840 for Shorts

This is the specification most often built from stale advice, and the one YouTube revised most recently.

Four details from the thumbnail page that change what you deliver:

• The file size limit depends on the device you upload from, not the file. 2 MB on mobile, 50 MB on desktop. A 6 MB thumbnail that fails on a phone uploads without complaint from a laptop.
• Custom Shorts thumbnails only exist in YouTube Studio on a computer, and the account has to be verified. There is no way to set one from the app.
• A podcast playlist takes a 1:1 thumbnail, not 16:9, and the mobile upload limit for podcast thumbnails is 10 MB rather than 2 MB.
• A vertical video with a 16:9 thumbnail gets overruled. YouTube replaces it with an auto-generated 4:5 crop on the home, explore and subscriptions pages. Your version still shows on the watch feed, in history and on non-mobile platforms. If a vertical video matters, supply a 9:16 thumbnail and let the platform crop from that.