Google's AI Is Reframing Your Performance Max Videos. The Opt-Out Form Closes September 4, and the Checkbox In Your Account Is Per Campaign.
The short version
Google began telling Performance Max advertisers on August 17 that it will use generative AI to create missing aspect ratios from video assets already uploaded to their campaigns, and pointed them at an opt-out form closing September 4, 2026. For most advertisers this is a non-event: a vertical cut of a direct-response video is not a problem, and Google does review enhanced assets before they run. The part worth ten minutes is structural. Google's documented in-account opt-out lives in campaign settings, one campaign at a time, while the form is the only account-level route on offer. If you manage more than a handful of Performance Max campaigns, file the form, because the checkbox has to be re-ticked every time somebody launches a new campaign.
What Google announced
Nothing, formally. There is no blog post, no entry on the Google Ads announcements page, and no updated help documentation. What exists is an advertiser email, first surfaced publicly on August 17, 2026 when JXT Group founder Menachem Ani posted the communication he received to X, and picked up by Search Engine Land the same evening.
Google describes it as an "asset optimization upgrade" for existing Performance Max video ads. Generative AI extends videos into aspect ratios the advertiser never supplied, so the creative can run across more inventory. Advertisers who do not want it can contact their account management team or submit Google's opt-out form by September 4, 2026. Google's note adds that video settings can also be changed from within a Google Ads account at any time.
This is the second time in 2026 that a Performance Max creative change has arrived this way. The AI voice-over rollout earlier this year used the same pattern: an emailed notice, an opt-out form, and a dated window, in that case March 20. It is also the fourth dated Google Ads change landing inside a five-week stretch, alongside the September 1 AI Max auto-upgrade and the language targeting removal later in the month. The full calendar is on the playbooks page.
What it actually means
Start with the honest deflation, because it is most of the story. Google has been generating and modifying creative in Performance Max for two years. Auto-generated video ads already build videos out of your images and text when an asset group has no uploaded video. Text customization, which Google renamed from automatically created assets, already rewrites your headlines, and the July 2026 terms of service explicitly authorize Google to generate on your behalf. Video enhancements already crop your horizontal footage into vertical and square. If your video is a product montage built to drive clicks, a machine-made vertical cut of it is not a crisis, and treating it as one is how a publication spends credibility it will want later.
But there is a real line here, and it is checkable against Google's own documentation rather than asserted. Every creative automation Google has shipped in Performance Max until now either selected among assets you supplied or assembled from assets you supplied. Google's live help page on Performance Max video automation describes video enhancements in exactly two operations: "Create vertical and/or square video assets from your original horizontal video," and "Create shorter versions of your original video asset." The companion page on advanced reporting and controls goes further and explains the mechanism: "The model breaks the video into explicit 'scenes' and detects important elements such as human faces, key objects, logos, text, and motion."
That is saliency detection and cropping. It finds what matters in the frame and reframes around it. Every word of Google's description is about your original video. Generative extension is a different operation: it manufactures pixels that were never in any asset you gave them, and puts them inside a video carrying your logo. That is a category line, not a hype line.
Three control surfaces, and the one with a blank cell
Here is where it gets operational. Google Ads now has several places to govern creative automation, and they do not cover the same things or operate at the same level.
| Control | Where it lives | Scope | Documented to govern |
|---|---|---|---|
| Video enhancements checkbox | Campaign settings → Asset optimization → Video → uncheck Enhancement | Per campaign | Vertical and square reformat, shorter versions, voice-over |
| Account-level automated assets | Campaigns → Assets → Association → Account level automated assets → Advanced settings | Account, with per-campaign override | Sitelinks, images, structured snippets, callouts, business information, location. Video is not listed. |
| Individual asset removal | Campaigns → Assets → Edit dropdown → Remove | Per asset, after the fact | Any system-generated asset already created |
| The opt-out form | Emailed link, or your Google account team | Account, per Google's email | Generative aspect-ratio extension. Not documented anywhere on support.google.com. |
Two things fall out of that table. The first is the practical one and it decides your Monday: the only documented in-product control for video enhancements is campaign level. Google's account-level automated assets settings, which do exist and do work exactly the way you would want, cover sitelinks, dynamic images, structured snippets, callouts, business information and location assets. Video is not among them. So an agency with eleven accounts and forty Performance Max campaigns is choosing between filing eleven forms once, or unchecking forty boxes and then unchecking them again every time a new campaign launches. The form is durable. The checkbox decays.
The second is an inference, and it should be labeled as one. The behavior Google emailed about is generative extension. The behavior Google documents is cropping and trimming. The documentation has not been updated, so it is not established that unchecking Enhancement suppresses generative extension. What is established is that Google pointed advertisers at a form rather than at the toggle, which is at minimum an odd choice if the toggle already did the job. Do not treat the checkbox as a substitute until someone confirms its scope.
Every creative automation before this one worked with footage you shot. This one paints in the parts you didn't.
What Google gets right, in Google's words
Two things deserve stating plainly, because a brief that omits them is a scare piece. Google's documentation says: "We'll conduct multiple reviews to ensure that all enhanced videos meet high quality standards. Only enhanced assets that pass quality reviews will be added to your campaign." That review gate is real. And Google has built genuinely useful visibility here: asset-level reporting now surfaces every automatically enhanced video across asset group reporting, campaign-level asset reporting and Performance Max channel-level reporting, and there is a one-click A/B experiment that tests a campaign with and without a specific enhancement on the existing budget.
The limit is scope. Google reviews for Google's quality standards. It does not review against your brand guidelines, your product accuracy, your legal copy or your franchise standards, and it has never claimed to. Whether that gap is a governance problem or a rounding error is a question about your business, not about the feature. (The strategic version of that argument, about who actually owns responsibility for creative a machine produced, is The Default Owner on Uncommon Move.)
Signal or noise: low for most advertisers, high in two cases
Low if your Performance Max video is direct-response creative and nobody in your business has to approve it before it runs. Google's review gate will catch the genuinely broken output, a generated vertical crop is not a brand incident, and you can safely do nothing.
High if an unreviewed change to approved creative is a problem in your business: regulated verticals, franchise systems, anyone with a brand book and a person whose job is enforcing it. The review gate is not your review gate.
Also high if you manage enough Performance Max campaigns that a per-campaign opt-out does not scale. This is a workflow problem rather than a creative one, and it is the reason most agencies should file the form regardless of where they land on the brand question.
If neither applies, close the tab. That is a legitimate answer and it is the right one for most accounts.
The Monday-morning playbook
- The two-question test, first, because it may end this for you. Do you run Performance Max with an uploaded video asset? Does anyone in your business have to approve creative before it runs? Two noes and you are done. Google is right about your account.
- Look before you decide. Go to Campaigns → Assets and find the automatically enhanced videos. Asset-level visibility is live across asset group reporting, campaign-level asset reporting and Performance Max channel-level reporting. Watch the ones you did not upload. This answers the question that actually matters, which is not "what will Google do" but "what has Google already done."
- File the form once per account, before September 4. It is the only account-level route on offer and it is durable. This is the twenty-minute version of the job across a book of accounts. Ask your Google rep for the link if you did not get the email; the notice went to a subset of advertisers, not all of them.
- If you are not filing the form, uncheck the box per campaign. Campaign settings → Asset optimization → Video → uncheck Enhancement. There is a bundled control that turns off all video enhancements at once within a campaign. Put a recurring reminder on your campaign-launch checklist, because new campaigns will come back on.
- Prefer removal over blanket opt-out where you can. Campaigns → Assets → Edit dropdown → Remove takes out an individual system-generated asset while leaving the automation running. If two enhanced videos out of nine are wrong, that is a two-asset problem, not a reason to turn off a performance feature.
- Run the one-click A/B test before you make it permanent. Google's own experiment tests a campaign with and without a specific enhancement on the existing budget. Opting out on brand anxiety without measuring the cost is how accounts quietly get worse. Get the number, then decide.
- Look harder at the montage accounts than the brand films. Generative extension has the most room to go wrong on stock-clip montages with text overlays composed for a 16:9 safe area, because the model is painting around type that was never meant to move. That shows up as a CTR problem, not as an angry email, which is exactly why nobody catches it.
- Re-check in mid-September. The documentation will presumably catch up to the behavior. When it does, the scope question above gets an answer and this decision is worth revisiting. Set the reminder now.
The bottom line
Most advertisers should do nothing here, and saying so is the point of a signal rating. But "do nothing" and "do nothing about it, ever, across forty campaigns you will keep adding to" are different positions, and Google's opt-out design quietly makes the second one expensive. Twenty minutes of forms before September 4 buys an account-level default that survives your next launch. The alternative is a checkbox that resets every time somebody builds a campaign, governing a behavior Google has not documented yet. That asymmetry, not the generative video itself, is what makes this worth your week. For the pattern this fits into, see AI Max for Search Campaigns, the Partners Alpha brief on what else you cannot control inside Performance Max, and the LSA migration for what happens when Google moves an entire campaign type into it. For how we rate any of this, Signal vs. Noise.
Sources
- Search Engine Land: "Google Ads will use generative AI to resize Performance Max video ads", published August 17, 2026, updated August 18, and the source for the September 4 date and the opt-out form
- Google Ads Help: "About Performance Max video automation", the primary document for the two documented enhancement behaviors and the campaign-level opt-out path
- Google Ads Help: "About advanced reporting and controls for creative video automation in Performance Max", for the scene-detection mechanism, asset-level reporting surfaces, individual asset removal and the A/B experiment
- Google Ads Help: "Performance Max account-level automated assets", for the account-level asset types, which do not include video
- Search Engine Watch: "Google Ads expands AI-generated aspect ratios for PMax video ads", August 2026, corroborating coverage
Google communicated this by email to a subset of Performance Max advertisers rather than through the Google Ads announcements page, which has published nothing since May 20, 2026. The September 4 deadline and the existence of the opt-out form reach this brief through Search Engine Land's reporting of that email and through the advertiser communication posted publicly by Menachem Ani, not from a Google-published page; the form itself is not linked on any public Google surface at the time of writing. Google's help documentation at answer/16048023 was re-checked on August 23, 2026 and still describes video enhancements only as reformatting and shortening your original video, with no mention of generative extension. This brief will be updated when the documentation catches up.
Frequently asked
When is the deadline to opt out of Google's AI video reframing?
September 4, 2026. Google began notifying Performance Max advertisers on August 17, 2026 that it will use generative AI to create missing aspect ratios from video assets already uploaded to their campaigns. Advertisers who do not want it can contact their Google account team or submit Google's opt-out form by September 4. Google has said video settings can still be changed inside the account after that date, but the form is the only account-wide route offered.
Is the Performance Max video enhancement opt-out account level or campaign level?
The in-product control is campaign level. Google's help documentation gives the path as Campaign settings, then Asset optimization, then Video, then uncheck Enhancement, which has to be done in every campaign. Google's account-level automated assets settings cover sitelinks, images, structured snippets, callouts, business information and location assets, and do not list video. The emailed opt-out form is the only account-level route currently on offer, which is why it is worth filing even if you also uncheck the box.
Does Google review AI-generated video before it runs?
Yes, but against Google's standards rather than yours. Google's help documentation states that it conducts multiple reviews and that only enhanced assets passing quality review are added to your campaign. That review covers general quality, not your brand guidelines, product accuracy or legal copy. You can see every automatically enhanced video in asset reporting and remove individual assets from Campaigns, then Assets, then the Edit dropdown, then Remove.
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