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AI ads for Reels: from brief to finished file (2026)

Plan the product, copy, audio and framing together, then inspect the finished Reels file in the current placement preview.

Kevin Dosanjh
Co-founder / CMO, AI Vidia · Updated

A Meta Reels ad is a vertical 9:16 video. Meta's Ads Guide, read on 25 October 2026, lists 1440 x 2560 pixels and suggests keeping roughly 14% of the top, 35% of the bottom and 6% of each side free of text and key elements. Burn the captions in and check the placement preview. AI Vidia delivers 9:16 videos up to 30 seconds on the Performance Retainer; other formats on request.

Editorial flat lay of a smartphone displaying a native vertical Meta Reels ad frame on a warm off-white surface.
On this page7 sections
  1. 01Confirm the placement and deliverable
  2. 02Compose for vertical viewing
  3. 03A hypothetical coffee-grinder storyboard
  4. 04Review sound, copy and product together
  5. 05Explain AI use at handover
  6. 06Match the copy to the correct variant
  7. 07Deliver files that can be tracked in a test

A Reels ad should be understandable on a phone and work in the actual placement preview. Plan product, text and crop together before producing final files.

Confirm the placement and deliverable

Ask the person running advertising to specify the placement, destination and required file. Meta's Ads Guide, read on 25 October 2026, lists a 9:16 ratio at 1440 x 2560 pixels for Reels video ads, up to 15 minutes on Instagram Reels, no maximum length on Facebook Reels and a 4 GB file limit. Check current upload requirements in the account rather than reusing an old specification sheet. The actual display and use of the material form part of the review.

AI Vidia's Performance Retainer supplies 9:16 videos up to 30 seconds. That describes our deliverable, not every supported Reels duration or a complete platform specification. Agree additional formats separately. Which Facebook and Instagram placements the 9:16 master covers, and when a 4:5 Feed version is agreed, is on our Facebook and Instagram ad creative page.

Editorial flat lay of a phone showing a vertical Reels ad frame with safe zone margins marked at top and bottom.
Illustration: Editorial flat lay of a phone showing a vertical Reels ad frame with safe zone margins marked at top and bottom.

Compose for vertical viewing

Show the product at a size that makes the relevant detail visible. Cropping a wide image can remove hands, packaging or the part of the scene that explains use. Plan framing while the script and scene can still change.

Leave room for text and essential details around the actual interface. Meta's Ads Guide suggests keeping roughly 14% of the top, 35% of the bottom and 6% on each side free of text, logos and other key elements, and Facebook Reels does not auto-caption ads, so burn the captions in. Use the placement preview to check whether buttons or other elements cover anything important.

Side by side comparison of a pillarboxed 1:1 ad crop next to a native 9:16 Reels ad with full-bleed product framing.
Illustration: Side by side comparison of a pillarboxed 1:1 ad crop next to a native 9:16 Reels ad with full-bleed product framing.

A hypothetical coffee-grinder storyboard

Suppose you want to show the container, control button and result. Start with a vertical storyboard in which each frame has a clear purpose. A button close-up can explain operation while another shot establishes size.

If a long subtitle covers the essential product detail, shorten the wording or reposition it. If AI cannot depict the required motion correctly, film it or use another visual approach. This is a planning example, not performance evidence.

Watch without sound too. The main explanation should still make sense when audio is not heard. This checks your message without assuming that every Reels viewer behaves the same way.

Native 9:16 Reels frame with hook text and product placed inside the safe zone.
Illustration: Native 9:16 Reels frame with hook text and product placed inside the safe zone.
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Review sound, copy and product together

  • Is the product recognisable in every relevant shot?
  • Are all spoken and visible claims approved?
  • Can subtitles be read at their displayed pace?
  • Do sound and image align at cuts and the ending?
  • Does the destination match the offer shown?
  • Has the final export been inspected in the actual preview?

Review the exported file, not only the editing project. Audio, cropping and text defects can appear late. Approval of the project view does not establish that the upload file is correct.

Flat lay of a printed cost report next to a stack of vertical phone mockups showing native Reels ad frames.
Illustration: Flat lay of a printed cost report next to a stack of vertical phone mockups showing native Reels ad frames.

Explain AI use at handover

Describe which elements were generated or altered. In a 1 June 2026 update to its February 2025 post on AI transparency in ads, Meta says it will begin detecting ads made or edited with third-party AI tools through industry-standard signals and show an "AI info" label in About this ad. What each platform requires is in AI labels on Meta, Google and TikTok ads in 2026. Our AI ad governance page shows how the label is agreed per platform and market before delivery.

Do not assume a label always appears in one position or that labelling means rejection; see how labelling, approval and rejection differ. Keep product evidence, content provenance and platform status distinct so questions can be resolved precisely.

Match the copy to the correct variant

Place the approved headline and subtitles on the actual delivery video. Check whether their meaning fits the accompanying shots. A claim about a large container can become inaccurate if the clip shows the smaller variant.

Read the ad text outside the video together with the destination. A correct file can still be used in an incorrect offer context. Supply the approved copy and relevant product link to the uploader.

Save the final combination in the delivery register. Record changes made before publication so later results and questions can be tied to what was actually used.

Deliver files that can be tracked in a test

Name concepts and variants clearly and include approved copy. When testing different openings, the person running advertising must be able to identify the difference. Otherwise, results are difficult to use in the next brief.

A correct Reels file is a production deliverable, not proof of a click rate, completion rate or cost per purchase. Use the video-completion guide for attention measurement and the package overview for production scope. File delivery does not automatically transfer advertising management to AI Vidia.

Frequently asked questions

01Which format does AI Vidia deliver?
Performance Retainer includes 40 videos per month in 9:16, up to 30 seconds each. See the pricing page for the full agreement.
02Can we rely on fixed pixel safe zones?
Not as fixed pixels. Use Meta's percentages as the starting point: keep the product, text and offer out of roughly the top 14%, the bottom 35% and 6% on each side, then check the finished file in the placement preview.
03Does AI labelling mean rejection?
No. These are separate matters. Follow the relevant guidance and check the actual status of the ad.

Sources

  1. 01Meta Newsroom: Expanding GenAI transparency for Meta's ads products, 3 February 2025, updated 1 June 2026
  2. 02Meta Ads Guide: Instagram Reels video ad specs (read 25 October 2026)
  3. 03Meta Ads Guide: Facebook Reels video ad specs (read 25 October 2026)

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