YouTube Shorts Ad Specs: Format, Length and Preview Checks

Start with a 9:16 vertical file at 1080 × 1920, then check the campaign. A file can meet video dimensions and still render differently across Shorts, in-feed and in-stream placements. Length, preview access and asset controls vary by campaign type.

Shorts ad specs at a glance

Google's general video specifications also accept several file containers. Container acceptance does not guarantee campaign or placement eligibility. See the current video ad specs and your campaign's own setup flow.

Why a single “Shorts spec” can mislead

Google Ads can use one video across more than one format. In multi-format Video View and Video Reach campaigns, Google optimizes delivery across the formats selected for the campaign. You cannot pin each individual video asset to Shorts only in those setups. Google documents asset-level creative preferences for Demand Gen campaigns instead.

That means three separate checks matter:

1. File validity: can the platform process the uploaded video?
2. Campaign eligibility: can this campaign use that asset in the placement you want?
3. Rendered impression: does the actual preview preserve the message on the target device?

Passing the first check says nothing definitive about the other two. If the campaign also uses in-feed inventory, note that Google says vertical assets in Video View and Video Reach campaigns do not serve in in-feed environments. A Shorts-ready portrait asset may therefore behave differently in a broader campaign.

Compare the campaign path before exporting versions

Campaign controls and documentation can change. Confirm the current options inside your account instead of copying an old setup from a tutorial. Google's Shorts preview guide documents the gallery flow for Video View and Video Reach campaigns and the current limits for live previews.

Adapt the idea to vertical instead of shrinking a landscape export

A 9:16 file is a layout choice, not only a pixel setting. Reusing the same footage can be sensible, but a vertical version should still keep the subject, proof and text legible inside a narrow frame. Google notes that horizontal assets shown in Shorts can appear with blurred bands at the top and bottom.

• Keep the key demonstration in the portrait crop, not just the center of the original canvas.
• Check titles, prices, logos and calls to action against the safe areas for the actual campaign and device.
• Keep enough space for platform controls and CTA overlays. Google says CTA timing varies by campaign type, with some formats showing the button after 3 seconds and Video View or Video Reach after 10 seconds.
• Preview with sound and without sound. Confirm that captions support the message but do not replace evidence that only audio can prove.
• If you compare vertical and landscape versions, state what else changed. A crop, new opening, different voice-over and altered offer make it hard to attribute a result to aspect ratio alone.

Use the separate vertical video ad safe-zone checklist for placement overlays. It covers what may be obscured in a crop; this guide covers campaign asset requirements and previews.

A practical preflight before launch

1. Write down the campaign type, selected formats, objective and target devices.
2. Confirm the exact YouTube video asset and its version. Verify that it is public or unlisted as intended.
3. Check dimensions, aspect ratio, duration, sound and file playback on a phone.
4. Review the first few seconds for a clear message before the CTA appears. The button timing depends on campaign type.
5. Open every available Google Ads preview for Shorts and other selected formats. Inspect mobile and desktop separately.
6. Check whether in-feed inventory is part of the plan and whether the asset is eligible for it.
7. After edits, generate a fresh preview and review the final uploaded version again.
8. Record the planned metric and a baseline before launch. A spec checklist cannot tell you whether an edit increased views or conversions.

Where video analysis fits

An ad review can help you inventory the opening promise, visible proof, edits, overlays, audio and call to action in the uploaded creative. It cannot inspect your Google Ads account, determine campaign eligibility, create the official preview or report campaign results. Treat report timestamps as candidates and replay the source before quoting a line or relying on a brief visual detail.

For the next step, see how to review Google Ads Creative guidance and the video ad creative testing matrix. The first separates platform suggestions from source evidence; the second helps record one test variable and its measured result.

Frequently asked questions

What size should a YouTube Shorts ad video be?

Use a 9:16 vertical export at 1080 × 1920 for the recommended HD starting point. Check any campaign-specific requirements in the current Google Ads workflow.

How long can a YouTube Shorts ad be?

Google allows Shorts ad videos up to three minutes, but only the first 60 seconds play in the Shorts feed. Google recommends less than 60 seconds, and it lists different recommended ranges for different objectives.

Can I upload a landscape video for Shorts?

Some campaign setups support landscape assets, but Google prioritizes vertical assets for Shorts. A horizontal asset can appear with blurred bands. Build and preview a portrait version if the placement is important.

Does a vertical asset guarantee Shorts placement?

No. Campaign type, selected ad formats, asset controls and delivery settings affect eligibility and serving. Check the campaign and its preview instead of relying on the file dimensions alone.

Can AdScanVideo check my campaign or guarantee that my ad meets these requirements?

No. AdScanVideo analyzes a video file you upload. It does not connect to your Google Ads account or certify placement eligibility, policy compliance or performance.