Connected TV vs. online video advertising: What’s the difference?

Connected TV (CTV) and online video (OLV) aren’t the same thing. 

To a consumer, video might just look like video. But to a digital marketer, CTV advertising and OLV advertising differ in where ads appear, how people watch them, and how campaigns can be optimized.

It’s easy to see why these channels are commonly confused. Both use digital video creative, are delivered online, and can be bought programmatically.

But there are strategic differences between the two that can be leveraged by advertisers to improve campaign performance:

• CTV advertising delivers targeted video ads across streaming platforms and services, such as Roku, Hulu, Tubi, and Peacock, that viewers commonly access on internet-connected TV screens.
• OLV advertising, meanwhile, consists of digital video ads delivered across websites, mobile apps, and social feeds outside of streaming environments.

Ultimately, successful media campaigns come down to a core strategic decision: When should a marketer use CTV, online video, or both?

In this blog post, we’ll break down the key differences between CTV and OLV, how each channel works, and where they fit within a broader media strategy.

What’s the difference between online video and CTV advertising?

Despite their similarities, CTV and OLV differ in key areas such as viewing context and engagement, inventory types, creative requirements, audience behavior, targeting, measurement, and the role each plays in a media plan. 

The table below explores the differences between CTV and OLV at a glance:

Category	CTV	OLV
Primary viewing environment	CTV devices and streaming environments.	Similar to where display ads appear on websites, apps, mobile, and other digital environments.
Typical viewing context	Larger screen, lean-back viewing, sometimes with multiple household members.	More varied, often personal device-led, “lean-forward” viewing.
Inventory	Full-screen, often unskippable ads within streaming content.	Websites, apps, digital video inventory; ads may be skippable or can be clicked away from, depending on the placement.
Creative experience	Full-screen video with an emphasis on storytelling and brand impact.	Greater variation depending on placement and device.
Interaction	Less focused on clicks, although interactive formats are evolving.	More direct click or tap interactions.
Targeting	Data-driven audience targeting, typically at the household level using identifiers such as IP addresses or household IDs that may be shared across multiple people.	Data-driven audience targeting, often at the individual or device level using identifiers such as cookies, mobile advertising IDs, and logged-in user IDs.
Measurement	Primarily impression- and completion-based, with view-through measurement used to connect ad exposure to downstream actions. Attribution often relies on household- or device-level matching.	Supports both click-through and view-through measurement, along with more detailed engagement data such as quartile completion, pause, mute, viewability, and on-site behavior.
Planning role	High-impact streaming reach, brand awareness, and precision audience targeting at the household level.	Flexible reach, engagement, and video storytelling across multiple digital environments.

The biggest difference is where they’re seen

Programmatic infrastructure allows marketers to target similar audiences across both CTV and OLV. But where and how an ad is viewed creates two distinct experiences and can achieve different goals for an advertiser. 

Beyond just the type of device used, the viewing environment can shape how people experience and respond to an ad.

CTV ads are typically viewed on large HD or 4K screens. This large physical presence creates a high-impact, cinematic backdrop that magnifies visual details, brand logos, and audio production. 

In contrast, OLV ads are often viewed on smaller, personal screens like smartphones, tablets, or laptops. These screens may be smaller, but viewers are typically much closer to them and can interact directly with an ad.

Viewing context and consumer mindset can also differ greatly between CTV and OLV. 

CTV viewers typically settle down on the couch to watch long-form (often premium) TV series, movies, or live sports in a more relaxed, lean-back setting. The nature of living room viewing also means that CTV frequently involves co-viewing, with multiple household members watching the same screen, potentially expanding reach beyond a single viewer. 

Online video users, on the other hand, are typically in an active, task-oriented mindset: scrolling through news feeds, reading articles, checking apps, or looking for a quick video tutorial. They’re actively engaging with their device, and their viewing is almost exclusively individual and private.

Consumer attention is another way CTV and OLV advertising differ and can deliver different results.

CTV benefits from non-skippable inventory, full-screen delivery, and standard audio-on viewing, capturing long durations of sustained visual attention. The non-skippable nature of CTV ads delivers high completion rates, averaging 94.5% per 15-second ad. 

OLV operates in more varied environments, where viewers may be multitasking or have their devices muted. At the same time, it offers a direct opportunity for immediate action. Users can pause, skip, or click directly on an ad to learn more.

Ultimately, if the primary goal is high-impact brand awareness or driving top-of-funnel reach, CTV provides an ideal, full-screen stage. If the objective is to drive traffic to a site or engagement, online video may be a better option.

How do CTV and OLV ad placements differ?

Where an ad appears can influence how inventory is bought, priced, and planned. 

While both CTV and OLV deliver video creative programmatically, the inventory available across each channel is structured differently. Understanding the differences can help media planners choose the right inventory and media mix for their omnichannel campaigns.

CTV inventory

CTV inventory lives inside streaming environments, including ad-supported streaming TV (AVOD), free ad-supported streaming TV (FAST), and premium app networks accessed via smart TVs.

The ad experience is similar to traditional linear TV commercials: full-screen, non-skippable spots that run within live or on-demand programming.

Marketers frequently access premium CTV inventory through private marketplaces (PMPs), programmatic guaranteed deals, or publisher-specific packages (such as tentpole or live event programming).

CTV inventory is often ideal for campaigns where advertisers want to prioritize premium environments, broad reach, or key viewing moments. As a result, between 2026 and 2030, CTV ad spending is projected to nearly double, reaching $60.89 billion USD.

OLV inventory

In contrast, OLV inventory is distributed across the open web, mobile devices, digital publisher sites, and app ecosystems.

OLV spans a wide range of placement types, such as in-stream video (in the form of pre-roll, mid-roll, and post-roll ads that play before, during, or after video content within digital media players), native outstream video (for example, video ads placed seamlessly between paragraphs of editorial articles that play dynamically when scrolled into view), and in-app and in-feed video (engaging units embedded directly inside mobile apps, social feeds, and digital publisher layouts).

Because OLV inventory spans a broad range of publishers, exchanges, and PMPs, advertisers typically have more flexibility to scale campaigns and adjust bids, budgets, and targeting in real time.

As a result, programmatic video ad spending is on the rise, reaching $151.14 billion USD in 2026 and increasing 23% year-over-year.

Strategic implications for media planning

These differences influence how each channel fits into a media plan. 

CTV inventory can help advertisers secure impressions in premium streaming environments, extend reach around high-value content, and create a more immersive brand experience.

OLV, meanwhile, provides broad digital reach and flexibility to scale, optimize, and drive direct engagement across personal devices.

How does audience targeting work for CTV vs. OLV?

Both CTV and programmatic OLV advertising can support data-driven audience targeting. Marketers can use first-party data, demographic and behavioral segments, contextual targeting, and geographic parameters across both channels. 

Because both are bought programmatically, they can reach specific audiences based on who they are and what they’re interested in, rather than relying on traditional broad TV buying methods, such as dayparts. 

The main difference is how audience identity is resolved across each viewing environment.

CTV targeting operates in a cookie-less streaming environment. As a result, targeting often involves household IP addresses, streaming device IDs, automatic content recognition data, and identity graphs.

Online video, by contrast, operates in web browsers and mobile apps where persistent identifiers exist, such as device IDs, publisher pixels, first-party cookies, and emerging identifiers like UID2. This can make it easier to target and retarget individual users or devices, depending on the environment and available data.

Because of these differences, the choice between CTV and OLV shouldn’t come down to which channel offers better targeting. Both can support sophisticated audience targeting strategies, whether used individually or as part of an omnichannel campaign.

CTV is well suited to household-level reach, contextual targeting, and cross-device strategies that allow advertisers to retarget across channels such as display, native, and OLV.

OLV, meanwhile, can support more direct individual- or device-level targeting and retargeting, such as reaching someone who visited a product page or abandoned a cart. It’s also ideal for encouraging direct actions like clicking on a link, filling out a form, or making a purchase.

Ultimately, the best approach involves using the two channels together.

How do CTV creative requirements and strategy differ from OLV?

Dropping identical video assets into both CTV and OLV ads might save time, but it might not always yield the best campaign results. The physical screen sizes, viewing distances, sound, and interactions differ between CTV and OLV, so creative should be adapted to how people experience each channel.

Screen size, viewing distance, and production expectations

CTV ads are often delivered on large-screen televisions, which demand cinematic production value. Assets should hold their own next to premium streaming content—after all, low-quality ads can be jarring when aired next to high-quality programming. 

Recycling a vertical, sound-off social clip designed for mobile devices onto a large TV screen can underwhelm viewers and waste premium inventory.

OLV ads, by contrast, are consumed on smaller, personal screens held close to the viewer. Production needs to be digital-native and scroll-stopping, designed to capture attention immediately within feeds, pre-roll players, or outstream placements.

Sound and context

With CTV, sound is fully integral to the viewing experience. As such, CTV ads should utilize music, voiceovers, and rich sound design to help build brand recall.

With OLV ads, viewers frequently watch with the sound off. Instead of relying on audio to help get the message across, successful OLV creative should use attention-grabbing captions, visual text overlays, and front-loaded hooks where the entire message is revealed in the first three seconds. 

Interactions and CTAs

CTV generally offers fewer direct interaction opportunities than OLV. Although interactive CTV ad formats, like on-screen quizzes, are becoming more common, viewers don’t typically click on the ad itself. 

As a result, CTAs must rely on second-screen actions from viewers, like scanning QR codes, visiting a URL, or searching for a brand or product after watching a CTV ad.

OLV is interactive by nature. Viewers can click, tap, or swipe directly on the ad, making it easier to incorporate clear CTAs, clickable end cards, and direct paths to a website, landing page, or app.

Ad length and format 

CTV spots often stick to 15- and 30-second lengths, matching traditional linear TV commercial structures.

OLV, however, is highly flexible across durations and aspect ratios. Versioning can include six-second bumpers, 15-second pre-rolls, horizontal 16:9 spots, vertical 9:16 video, and 1:1 square formats, depending on where the ad runs.

Overall, it’s best to customize the ad to where it’ll appear. Narrative and branding should remain consistent across CTV and OLV creative, but each should be tailored to the medium ads will appear on. 

For example, if a cinematic, 30-second CTV ad is in the works, plan for it to be edited, captioned, and optimized for digital OLV environments, rather than dropped in as-is for small-screen viewing. 

How do measurement and KPIs differ between CTV vs. OLV?

Despite their similarities, CTV and OLV shouldn’t be measured using the same KPIs. Tracking metrics that align with each channel’s role and campaign objective provides more useful insights than comparing performance side by side.

At a foundational level, both channels share core delivery metrics such as impressions, cost, and delivery efficiency. They can also both be tied to performance outcomes, but the way those results are measured and interpreted can differ.

For example, clicks are a common performance indicator for OLV because viewers can often interact directly with an ad. CTV doesn’t offer the same click-based experience, so CTR usually isn’t the right way to evaluate CTV performance.

Instead, CTV campaigns are often measured using metrics such as household reach, unique households reached, incremental reach, and downstream conversions or brand lift.

Ultimately, campaign objectives should dictate your KPIs. If an advertiser’s goal is generating direct engagement, site traffic, or conversions, OLV is likely the best option. But if building top-of-funnel awareness and brand recall are more important, CTV may be the better route.

Further Reading: Learn more about measuring CTV campaign performance.

When should you use CTV advertising?

CTV is particularly useful when your media plan demands:

• Extending a traditional television or video strategy into streaming environments.
• Reaching audiences on larger screens in a lean-back viewing setting.
• Combining cinematic, television-style storytelling with programmatic targeting.
• Gaining incremental reach by reaching cord-cutting streaming audiences.
• Accessing premium streaming inventory during tentpole, cultural, or live sports events.
• Connecting big-screen brand awareness with a broader programmatic cross-device campaign.

When these goals align with your campaign objectives, CTV can help expand reach, strengthen brand awareness, and connect streaming exposure with activity across other channels. 

To learn more, explore CTV advertising with StackAdapt.

When should you use OLV advertising?

OLV can be a strong option when your goals include:

• Delivering flexible video storytelling across a broad range of websites, apps, and digital environments.
• Leveraging greater flexibility across varied device placements, from mobile feeds to desktop pre-rolls.
• Driving direct digital engagement, clicks, and other interactions where placements support them.
• Supporting broader digital and programmatic campaigns with scalable video reach.
• Extending reach beyond CTV while managing frequency across additional digital touch points.

Online video can help expand reach, drive engagement, and support performance across multiple devices and environments. 

To learn more about maximizing these formats, explore programmatic video advertising with StackAdapt.

Where do CTV and OLV fit in the marketing funnel?

CTV is often used higher in the funnel to build awareness, expand reach, and introduce a brand or message in a larger-screen streaming environment (although advertisers are increasingly using CTV to support lower-funnel goals like site visits, conversions, and other actions). 

OLV can support those same awareness goals while also playing a strong role further down the funnel, where clickable formats make it easier to drive site visits, engagement, retargeting, and conversions. 

When should you use CTV and online video together?

Choosing between CTV and OLV doesn’t have to be an either-or decision. Rather than competing for budget, the two channels perform best when deployed as complementary channels within a unified, full-funnel media strategy. 

When executed together, CTV and OLV cover each other’s functional gaps. CTV provides a high-impact, cinematic stage for top-of-funnel brand building and household reach, while OLV delivers scalable reach and direct user engagement.

Used together, CTV and OLV can help marketers reach audiences across multiple screens, sequence messaging in different formats, and retarget viewers after exposure—delivering unskippable ads in premium environments while pairing them with cost-effective digital video inventory to sustain frequency and drive interactions.

How to choose between CTV, OLV, or both

Choosing between CTV, OLV, or a combined strategy starts with understanding what the campaign needs to achieve and how audiences are most likely to engage with the message. 

Rather than choosing a format and trying to retrofit goals to it, media planners should evaluate their campaigns by working through core strategic questions, such as:

What’s the campaign objective? 

Determine what outcome the ads need to support. If the goal is brand recall, incremental reach, or household-level awareness, CTV provides an ideal stage. If the goal is driving traffic, clicks, or conversions, OLV may deliver better results.

Where does the target audience consume video? 

Look beyond simple device definitions to understand actual media habits. Consider whether your target consumer is consistently engaging with ad-supported streaming TV, or more regularly browsing across websites and mobile apps (likely, it’s a combination of both).

What viewing experience supports the message? 

Assess whether your message benefits from a high-impact, cinematic environment, the fast-paced interactivity of a personal device, or a combination of both.

What ad creative is available? 

Determine if your existing assets can work effectively across channels. A broadcast-quality, 15- to 30-second spot anchors a CTV campaign, but video ads require edits, captions, and fast-paced hooks to succeed in feed-based environments.

Ultimately, the right choice comes down to matching your campaign to the right viewing environment and utilizing each channel’s unique advantages together.

Common mistakes when choosing between CTV vs. OLV

To ensure your ad spend is allocated to the environments and strategies that will deliver the best results, here are some of the most common mistakes marketers make when using CTV and OLV advertising, as well as the best approach to take:

Common mistake	Why it matters	Better approach
Thinking CTV and online video are interchangeable because both use video.	Treating CTV and OLV as interchangeable can create mismatched expectations for cost, inventory availability, and audience behavior. CTV operates in a scarce, premium environment, while OLV thrives on abundant, auction-based web and app inventory.	Recognize that they operate in entirely different viewing environments. Align your buying strategy with each channel’s distinct opportunities.
Assuming CTV is simply “online video on a bigger screen.”	This ignores the psychological and physical attributes of streaming TV at home. CTV delivers lean-back, co-watching entertainment, whereas OLV is typically active, individual, and task-oriented.	Design your campaign around how the audience actually experiences the content (i.e., passive entertainment on the big screen versus active engagement on personal devices).
Using identical creative without considering viewing context.	Recycling a fast-paced, sound-off mobile social clip onto a big-screen TV can underwhelm a viewer, while a 30-second cinematic spot drags in a quick-scrolling, active digital feed.	Tailor your creative to the screen. Use high-quality, story-driven assets for CTV, and produce digital-native, captioned edits with front-loaded hooks for OLV.
Comparing performance using identical KPIs.	CTV and OLV support different types of engagement, so the most useful metrics aren’t always the same. CTV is often evaluated through reach, completion, brand lift, and downstream outcomes, while OLV can place more emphasis on clicks, site engagement, and direct conversions.	Let campaign objectives dictate KPI selection. Measure CTV through household reach and brand lift while evaluating OLV using click-through engagement and conversion metrics.
Choosing one channel when the objective may benefit from both.	Forcing a single channel to carry a complex, multi-stage customer journey limits performance by ignoring how effectively CTV and OLV complement each other.	Treat CTV and OLV as sequential layers rather than an either/or choice. Use CTV to introduce the brand to households at scale, then follow up with OLV to drive engagement and conversion.
Adding both channels without defining what each contributes.	Running both channels without a clear division of labor often results in wasted ad spend, uncoordinated messaging, and siloed measurement.	Establish a clear strategy where each channel has a defined role in the funnel. Use cross-channel attribution to understand how CTV and OLV work together to drive results.

Get started with CTV and OLV advertising

While CTV and OLV share a common foundation, they’re not interchangeable channels. Each one offers distinct viewing environments, inventory, audience targeting, and creative experiences that serve different roles within a media plan.

Neither channel is universally superior to the other. Instead, successful media planning depends on matching the channel strategy to your campaign goals. Start with your campaign objective, consider where your audience spends their time, adapt creative to the viewing environment, and choose KPIs that reflect the role each channel is meant to play.

Next steps

• Ready to put your CTV and OLV plans into action? Explore CTV advertising and OLV advertising with StackAdapt.

• Download this guide to learn everything there’s to know about CTV advertising and get best practices from industry experts.

• Find out how to capture attention with these CTV marketing strategies and see examples from our award-winning Creative Studio.

• If you’re in B2B, learn how to use CTV advertising to build awareness and grow your business.

FAQs about CTV and OLV advertising