What is over-the-top (OTT)? It is video delivered to you over the open internet, going "over the top" of the traditional cable, satellite, and broadcast pipes that used to be the only way TV reached a screen. Netflix, Hulu, Max, Peacock, Disney+, and the free ad-supported services are all OTT. The term describes the delivery method, not the device you watch on, and that distinction is the single thing most people get wrong about it.
What is OTT, in plain English?
Think of the cable company as a closed road. For decades, to get television you paid a provider who controlled the wire, the channel lineup, and the bill. OTT is what happens when video stops using that road and rides the regular internet instead. The content arrives "over the top" of the internet service provider's infrastructure without that provider packaging or gatekeeping it.
Because it is just video over the internet, OTT plays on anything with a screen and a connection: a phone on the train, a laptop at lunch, a tablet in bed, or the television in the living room. That last case is where the confusion starts, so it is worth nailing down before anything else.
OTT vs CTV: the difference that trips everyone up
OTT and connected TV get used interchangeably, and they are not the same thing. OTT is the how (video over the open internet). Connected TV is the where (a television screen reached through a smart TV, a Roku, an Amazon Fire TV stick, an Apple TV, or a game console).
| Term | What it describes | Example |
|---|---|---|
| OTT | The delivery method (internet, not cable) | Watching Hulu on your phone |
| CTV | The device class (the TV screen) | Watching Hulu on a Roku TV |
The cleanest way to hold it: all CTV is OTT, but not all OTT is CTV. When OTT content lands on the big screen, that impression is also a CTV impression. When the same Hulu stream plays on a laptop, it is still OTT but it is not CTV. Buyers care about the difference because the TV screen behaves differently from a handheld one: it is shared, it is sound-on and full-screen, and the click is usually gone. For the full breakdown of the device side, see automatic content recognition, the technology that lets smart TVs identify what is on screen.
How OTT advertising works
The ads inside ad-supported OTT are streaming video spots, usually 15 or 30 seconds, run as pre-roll before the content or mid-roll inside it. Most are non-skippable, which is part of why OTT completion rates run high compared with skippable formats.
Behind the scenes, OTT inventory is bought two main ways. You can buy it directly from a streaming service or its sales team, often as a reserved, guaranteed deal. Or you can buy it programmatically through a demand-side platform, bidding on impressions across many apps from one seat. A lot of premium OTT moves through guaranteed arrangements rather than the open auction, which is why programmatic guaranteed and curated private marketplace deals show up so often in OTT plans.
Pricing is on a CPM, a cost per thousand impressions. Premium streaming inventory commonly carries CPMs in the range of roughly $20 to $40, which sits above most display and social video and below national linear TV. The spots are typically sold against completed views, so you are paying for the ad to finish, not just to start.
Two operational details matter more on OTT than almost anywhere else. The first is frequency capping: because the same viewer can be reached across several apps and devices, capping how many times they see your spot is harder, and weak controls lead to the same person being hammered with one ad. The second is viewability and ad placement quality, since not every "OTT" impression is the premium living-room view the deck implied. Some of it is a small player in a browser tab.
Why OTT matters for your media plan
OTT matters because the audience moved. Cord-cutting pulled a large and growing share of TV viewing off cable and onto streaming, and most major services launched ad-supported tiers, which dramatically expanded the ad inventory available to buy. The people who became unreachable when they cancelled cable are reachable again through OTT, often on the biggest, most attention-rich screen in the house.
The real lever here is high-quality reach. OTT gives you premium, full-screen, sound-on video against streaming audiences you can target by geography, demographics, and audience signals, at entry points well below a national TV buy. For a brand trying to be remembered before a buyer is in-market, that is a genuine upper-funnel asset, not a vanity one.
Be honest about what it is not. OTT is a reach and awareness channel, not a click-and-convert one. The click is usually unavailable, so attribution leans on modeled outcomes and lift rather than last-click tracking. Judging OTT inside a last-click report will always make it look weak, because the report cannot see the screen where it did its work. The serious way to evaluate it is through incrementality testing, measuring whether the OTT exposure lifted outcomes versus a holdout, paired with sane reach and frequency goals.
Common mistakes with OTT
The first mistake is treating OTT like search and grading it on cost per conversion. It will lose that test every time, not because it failed, but because you measured the wrong thing.
The second is ignoring fragmentation. Spreading a small budget across a dozen services with no shared frequency control means you under-deliver everywhere and over-expose the few people who happen to sit at the overlap. Concentrate, or use a platform that manages frequency across apps.
The third is buying "OTT" without checking what you bought. Inventory quality and brand safety vary across the ecosystem, and the difference between a guaranteed premium streaming placement and a long-tail app impression is large. Insist on transparency into where your spots ran.
The bottom line
OTT is the delivery method (video over the open internet) and it is the foundation underneath the streaming era. It is not a synonym for the TV screen, and confusing it with that screen leads to muddled plans and the wrong success metrics. Bought well, OTT is a premium reach channel that puts full-screen video in front of the audiences that left cable behind.
Judge it like the upper-funnel channel it is. Set reach and frequency goals, control exposure across services, demand placement transparency, and prove the value with lift, not last-click. Do that, and OTT earns its line in the budget. Treat it like a search campaign and it will look like a waste, which says more about the measurement than the medium.
Want OTT and connected TV that is bought transparently and measured by lift, not vanity completions? Our OTT and CTV team plans, buys, and reports streaming video against real reach and frequency goals. Email us at admin@moonsauceagency.com and we will map the streaming audience you can reach, the inventory worth buying, and how we will prove it worked.
Keep reading: Automatic content recognition · Viewability · Programmatic guaranteed · Back to the glossary
