OTT Inventory in DV360: A Practical Buyer's Guide
How OTT inventory works inside Display & Video 360 — where to find it, how to structure deals, target audiences and measure results across the living-room screen.
Understanding OTT Inventory in DV360
Over-the-top (OTT) advertising has moved from experimental line item to core budget for many advertisers. As audiences shift from linear TV to streaming, Display & Video 360 (DV360) gives buyers a single platform to reach the living-room screen alongside display, online video and audio.
But "OTT in DV360" is not a single product. It's a mix of inventory sources, deal types and device categories that need to be understood before you commit budget. This guide breaks down how OTT inventory actually works inside DV360 — where to find it, how to buy it, and how to hold it accountable.
OTT vs CTV: clearing up the terminology
The terms are often used interchangeably, but they describe different things:
- OTT (over-the-top) refers to video content delivered over the internet, bypassing traditional cable or satellite. It can play on phones, tablets, desktops or TVs.
- CTV (connected TV) specifically refers to that content viewed on a television screen — via a smart TV, a streaming stick, or a games console.
In DV360, most of the premium, full-screen, non-skippable inventory advertisers want is CTV-delivered OTT. When people say they want "OTT in DV360," they usually mean high-quality streaming video on the big screen.
Where OTT Inventory Comes From in DV360
DV360 aggregates OTT supply from multiple sources. Knowing which lever you're pulling matters, because availability, pricing and control differ significantly.
YouTube and Google TV inventory
Because DV360 sits within the Google Marketing Platform, it has privileged access to YouTube inventory — including YouTube on connected TV screens, which has become one of the largest sources of streaming viewership. This is a natural starting point for many buyers and integrates tightly with Google's audience and measurement stack.
Third-party publishers and streaming apps
Beyond Google-owned properties, DV360 connects to a wide range of broadcaster and streaming-app inventory through exchanges and direct publisher relationships. This is where you reach audiences inside ad-supported streaming environments and free ad-supported TV (FAST) channels.
Deal types available
OTT supply is transacted through the same deal structures as the rest of DV360:
| Deal type | Control level | Typical use case |
|---|---|---|
| Open auction | Lower | Broad reach, efficiency-focused campaigns |
| Private auction | Medium | Curated publisher lists with auction dynamics |
| Programmatic guaranteed | High | Fixed volume and rate with premium publishers |
| Preferred deals | High | Negotiated rate, non-guaranteed volume |
For premium CTV placements, programmatic guaranteed (PG) and preferred deals dominate, because top publishers rarely release their best inventory into the open auction. If reach and quality on the big screen are the priority, expect to spend most of your effort negotiating and setting up deals rather than relying on open-market bidding.
Building an OTT Campaign in DV360
Choosing the right insertion order structure
Separate your OTT and CTV activity from standard online video at the insertion-order or line-item level. Mixing device types in a single line makes optimisation and reporting far harder. A clean structure lets you:
- Set device-specific bids and budgets
- Report accurately on CTV versus mobile OTT delivery
- Apply the right creative specs to each environment
Targeting options for OTT
CTV targeting is less granular than display because you're often reaching a shared household screen rather than an individual. Practical targeting levers include:
- Audience targeting using Google audiences and your own first-party segments where supported
- Content and genre targeting to align with relevant programming
- Geographic targeting, valuable for regional or store-level campaigns
- Deal-based curation, effectively targeting by publisher and content quality
Be realistic: some cookie- and device-based signals available on other channels don't translate to the CTV environment. Lean on contextual, deal and first-party approaches instead.
Creative requirements
OTT and CTV creative demands are stricter than standard online video:
- Higher resolution and bitrate for full-screen playback
- Common durations of 15 and 30 seconds
- Non-skippable formats in most premium environments
- Clear audio and on-screen branding that works without a click
Because the ad can't be clicked in most living-room contexts, your creative and your measurement plan have to work harder to prove impact.
Frequency, Reach and Waste
One of the biggest risks in OTT buying is over-frequency. Because supply is fragmented across many apps and publishers, the same household can see your ad far too often if you don't manage exposure centrally.
DV360 helps here by allowing frequency caps across the campaign, but effective control depends on structure:
- Set cross-line-item frequency caps rather than capping per line only
- Consolidate OTT buying within DV360 rather than splitting across multiple platforms that can't deduplicate
- Monitor unique reach and average frequency together, not impressions alone
Consolidating streaming budgets into a single buying platform is one of the strongest arguments for running OTT through DV360 — it's far easier to manage reach and frequency across the funnel than stitching together siloed buys.
Measuring OTT Performance
Because OTT rarely drives a direct click, measurement should focus on outcomes further down the chain.
Metrics that matter
- Completed views / video completion rate — the baseline for whether your message was delivered
- Unique reach and frequency — did you reach new households efficiently?
- Brand lift — awareness, consideration and recall studies where volume supports them
- Incremental conversions — modelled or measured through cross-device attribution
Avoid judging CTV on last-click conversions alone. It is primarily an upper- and mid-funnel channel, and holding it to a click-based standard will systematically undervalue it.
Brand safety and verification
Premium OTT is generally a lower-risk environment than the open web, but verification still matters. Use inventory controls, publisher allow-lists and third-party verification partners integrated with DV360 to keep your brand alongside appropriate content. For a broader view of how we approach quality and controls, see our managed services.
Common Pitfalls to Avoid
- Treating OTT like display. The buying logic, creative and measurement are different.
- Relying only on the open auction. The best CTV inventory sits behind deals.
- Ignoring frequency. Fragmented supply plus weak caps equals wasted budget and annoyed viewers.
- Under-investing in creative. A repurposed low-resolution video undermines premium placements.
- Measuring the wrong thing. Set outcome-based KPIs before you launch.
Is DV360 the Right Platform for Your OTT Buying?
DV360 is a strong choice when you want to consolidate streaming, video, display and audio in one platform, deduplicate reach and frequency, and tie CTV into a wider Google Marketing Platform measurement setup. Its access to YouTube CTV inventory is a distinct advantage.
That said, running OTT well demands deal management, creative discipline and measurement maturity. Teams new to the platform often benefit from support to get set up correctly. Whether you want a self-serve account with expert guidance or fully co-managed support, the right operating model depends on your team's capacity and ambitions. Explore the full range on our services page.
Get Expert Help With OTT in DV360
OTT and CTV can deliver premium reach at scale — but only with the right deal strategy, structure and measurement in place. If you're planning a streaming campaign or want to audit your current setup, talk to our DV360 experts and we'll help you build an OTT approach that stands up to scrutiny.