Vertical video advertising is a term everyone uses and few people define the same way. That vagueness causes real problems: a publisher agrees to “add vertical video” and ends up with a horizontal ad in a portrait frame, or a buyer books vertical inventory and receives something closer to a banner with sound. This post defines the term properly, explains where vertical video runs, sets out the formats involved, and covers how the inventory is bought and measured.
What the term actually means
A vertical video ad is creative built for a portrait screen, usually at a 9:16 aspect ratio, served into a player of the same shape. Both halves of that sentence matter. Vertical creative in a horizontal player wastes most of the frame. Horizontal creative in a vertical player leaves empty bars above and below, and the ad looks like an afterthought next to content that fills the screen.
So vertical video advertising is not only a creative spec. It is a player, a placement and a demand setup that all assume the phone is being held upright, which is how most people hold it most of the time.
It is worth separating vertical video advertising from the vertical content around it. The content is the reason someone is watching. The advertising is what runs before, during or alongside that content. A strong implementation treats them as one experience rather than two systems bolted together.
Where vertical video runs
Three environments account for most of it.
Publisher websites. A vertical player sits inside an article or below it, often as a swipeable unit that offers a next story after each clip. The reader is already on the page, so the player earns attention rather than demanding it.
News and content apps. In an app, vertical video can live on a home feed, inside an article view or in a dedicated video tab. The gestures people learned in social apps transfer directly. We cover the specifics for app teams on the news and content apps page.
Games and utility apps. Here vertical video usually appears as a full-screen format at a natural break, such as a rewarded ad the player chooses to watch. The creative is vertical because the app is.
Connected TV is the obvious exception. CTV is horizontal by nature, and a cross-screen plan normally pairs vertical mobile inventory with 16:9 creative for the living room.
The formats involved
Vertical video advertising is not a single unit. In practice a publisher will run several of these together:
- 9:16 vertical video as the main in-stream ad inside a vertical player.
- 16:9 video, still widely supplied by advertisers, which a good player can present without breaking the layout.
- In-stream, where the ad plays as part of a video session the viewer chose to start.
- Outstream, where the video ad appears inside an article or feed without any surrounding video content.
- Floating player, which keeps a small player visible as the reader scrolls on.
- Sponsored story, a branded clip placed in the content sequence and labeled as advertising.
- Display units inside the player, including a 336×280 linear display, a full-player vertical display creative and a 320×50 bottom wing anchored below the player.
- Rewarded and interstitial formats in apps, where the full screen is available and the moment is chosen carefully.
The mix depends on the property. A mobile news site might run vertical in-stream plus a bottom wing. A game might run rewarded video only. There is no single correct configuration, which is why placement-level reporting matters more than a general rule.
Why it works on publisher properties
Three things tend to be true when vertical video is done well on a publisher’s own pages.
The format matches the device, so nothing is wasted. A full-height frame gives creative more room to work with than a small horizontal box parked in the middle of an article.
The interaction is already familiar. Tap to pause, swipe for the next clip, swipe away to leave. Readers do not need to learn anything, which lowers the friction of a unit they did not come for.
The environment is the publisher’s own. Unlike a social upload, the session stays on the publisher’s domain, the styling is the publisher’s, and the ad policies are the publisher’s to set. That combination is also what buyers mean when they ask for quality supply, as the advertisers side of the business tends to phrase it.
How it is bought
Vertical video is bought the same way as other programmatic video, with the same plumbing.
Demand reaches the player through OpenRTB, with creative delivered as VAST for video and native or banner responses for the display units. On the app side, an SDK handles the request and the render. The Vortex OpenSDK connects any ad network or SSP through Prebid Server, OpenRTB, VAST and native formats, and supports Google IMA and Google Mobile Ads, so a publisher’s existing partners keep working alongside curated demand. The SDK page covers the integration in more detail.
Direct deals still matter. Sponsored story placements and seasonal campaigns are often sold by the publisher’s own team, with programmatic demand filling the rest. Curated demand plus the publisher’s own partners is usually a healthier setup than either alone.
Supply hygiene is part of buying too. Correct ads.txt, app-ads.txt and sellers.json entries, pre-bid and post-bid fraud checks and creative filtering are what make the inventory buyable at a serious level.
How it is measured
Judge vertical video on more than one number.
- Viewability and completion tell you whether the ad had a fair chance to be seen and whether viewers stayed with it.
- Engagement covers clips viewed per session, time on page and how often readers swipe to the next story.
- Revenue per placement shows which positions earn their space, which is only useful if your reporting breaks down by placement rather than by site.
- Page and app health covers load time, scroll depth and, in apps, retention. A unit that lifts revenue while slowing the page is not a win.
Run changes as A/B tests rather than judgment calls. One placement, one variable, a long enough window to see return behavior, then decide.
Key takeaways
- Vertical video advertising means portrait creative in a portrait player, with the placement and demand set up to match.
- It runs on publisher sites, in news and content apps, and in games, while CTV stays horizontal.
- The format family includes 9:16 and 16:9 video, in-stream, outstream, floating players, sponsored stories, in-player display units and app formats like rewarded and interstitial.
- Buying works through OpenRTB, VAST, Prebid Server and direct deals, alongside curated demand and the publisher’s own partners.
- Measure viewability, completion, engagement, revenue per placement and page health together, and test one change at a time.
If you are weighing up where vertical video fits on your property, the publishers page sets out how Vortex Media approaches it.
