Platforms & teams · Demand Gen video ads
Vertical video ad generator for Demand Gen video ads on YouTube Shorts
The short answer
A vertical video ad generator is what a Demand Gen campaign needs most, because 9:16 is the one format Google specifically recommends and the one most advertisers never upload. Demand Gen is the campaign type that replaced Video Action Campaigns, and it runs your video across YouTube Shorts, in-stream, the YouTube feed, Discover, Gmail, and the Display Network. Google accepts video in 16:9, 1:1, 9:16, and 4:5, wants clips of at least 5 seconds (10 seconds or more to serve on YouTube in-stream), and recommends a vertical 9:16 asset because that is the format built for YouTube Shorts. AdsGen makes that vertical asset from a product URL: captioned, creator-style, several angles per pass, kept over 10 seconds so it stays eligible everywhere Demand Gen serves.
Demand Gen finished the job Video Action Campaigns started. Google stopped letting anyone create new Video Action Campaigns in April 2025 and upgraded the last existing ones to Demand Gen by April 2026, so if you run video for direct response on Google, you run it in Demand Gen now. The campaign serves across YouTube Shorts, in-stream, the YouTube feed, Discover, Gmail, and the Display Network, and it leans on vertical video to reach the Shorts inventory.
The asset most advertisers never produce is the vertical one. AdsGen builds it from a product URL. Paste the link and get captioned 9:16 creator-style ads, each a different angle, kept over the ten second mark so they stay eligible for in-stream as well as Shorts. Pair them with a horizontal and a square asset and your campaign has real creative in every slot instead of leaning on Google's auto-generated versions.
AdsGen
ad studio
Script demo, no account needed. AdsGen reads your page and writes the ad scripts. Video renders come with a plan.
Writing from your page. This takes up to a minute.
Switches every card at once. rewrites left in your free demo. A plan rewrites every card as often as you want.
ads written from
What the studio read: Product images read
written ad, line
Hooks
new hooks left in your free demo. A plan writes new hooks until they land.
This is your free demo batch, written earlier from . Your demo batch for is written: the angle, creator, hook, script and captions for each ad. A plan gives you variations across all six angles, batches a month on Starter, and the export for your editor.
See the plans and pricesNative vertical, captioned, ready for Ads Manager.
6 angles per product
20 script variations per URL
minutes not weeks
Native vertical + captions
What you get
The vertical Shorts asset your Demand Gen campaign is missing
Built for the Shorts slot
Google recommends a vertical 9:16 video because it is the format made for YouTube Shorts. That is the asset most brands never shoot, and the one AdsGen makes natively, so your campaign can actually reach Shorts inventory.
Over ten seconds on purpose
A Demand Gen video has to be at least 5 seconds, but anything under 10 seconds will not serve on YouTube in-stream. AdsGen keeps clips above that line, so one asset works across Shorts, in-stream, and the feed instead of being locked out of half your placements.
Real creative, not auto-generated
Leave the video slot empty and Demand Gen builds clips from your images and text with generative AI, hosted on a channel you cannot control. Upload your own vertical ads and you decide what runs. Generate several angles in one pass so the campaign has something to optimize between.
What it handles
From a product URL to uploadable Demand Gen video assets
You pick the angles, creators, and tone. AdsGen writes the hooks and scripts, casts the creator, and renders the ones you pick as native vertical ads with captions.
- Native 9:16 for YouTube Shorts
- Clips kept over the 10 second minimum
- Several angles per campaign
- Captions burned in for muted feeds
- Creator-style video from a product URL
this fixed the thing i gave up on
the fix i stopped looking for
everyone kept telling me to try this
recommended by people i trust
Why AdsGen
Why AdsGen fills the Demand Gen vertical video slot
Not a stiff corporate avatar, not a raw clip you still have to edit. A finished UGC video ad.
Creators that look real
AI creators built to look like real people filming on a phone, casual and feed-authentic, not uncanny.
Every winning angle
Problem-solution, testimonial, unboxing, "I was skeptical", founder, and listicle. Write up to 20 script variations per batch and render the strongest.
Zero cleanup
Native vertical, captioned, correctly sized for each platform. Download and run, no re-editing.
Good questions
Questions about Demand Gen video ads
Further reading
Guides that go deeper on Demand Gen video ads
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Demand Gen video specs covers the sizes, lengths, and aspect ratios each placement accepts.
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Demand Gen vs Video Action campaigns explains what changed in the migration and what it means for your creative.
Explore more
More ways teams make ads with AdsGen
Generate your first batch of UGC ad scripts
Paste a product URL and let AdsGen write the hooks and scripts, then cast a creator and render the ones you pick as ready-to-run video ads.
No filming · No creators · Ready to run