Pre-Roll Ads: Formats, Lengths, Specs

Pre roll ads explained for buyers: skippable vs non-skippable formats, lengths, how CPV and CPM billing work, and how to write the first five seconds.

Published 2026-10-29 · Video Marketing · Neverframe Team

Pre-roll ads in 2026: the short answer

Pre-roll ads are video ads that play before the content a viewer chose to watch. On YouTube that means skippable spots (the skip button appears after five seconds), non-skippable spots, and six-second bumpers. On connected TV, Twitch and publisher video players, the same slot is filled through ad servers that read the IAB VAST standard. A buyer has to decide which pre-roll format fits the goal and how long the cut should be, then make sure the brand appears in the first five seconds, before the skip button shows up.

The money behind this slot keeps growing. TV Tech, summarizing the IAB report released in April 2025, put it plainly:

"Digital video ad spend rose 18% in 2024 to $64 billion and is projected to grow another 14% in 2025, reaching $72 billion"

Source: TV Tech on the IAB 2025 Digital Video Ad Spend and Strategy Report. The IAB's own summary gives the same figures, saying total U.S. digital video ad spend "grew 18% YoY in 2024 to $64B and is projected to reach $72B in 2025" (IAB research page). TV Tech also quotes the report on the share of total TV and video budgets:

"This year's findings underscore a clear shift in momentum as digital video is expected to capture 58% of total TV/video ad spend in 2025, double its share from just five years ago."

Source: TV Tech.

A large part of that budget lands in the few seconds before a video starts. Google's documentation, the IAB standards and our own production rules describe how that slot is sold and what the creative inside it has to do.

What are pre-roll ads?

A pre-roll ad is an in-stream video ad placed at the start of a video. The term comes from the player timeline: pre-roll runs before the content, mid-roll interrupts it, post-roll follows it. YouTube describes the logic in its help center for creators:

"We may show the ad formats in the table below before ("pre"), during ("mid"), or after ("post") the video."

Source: YouTube Help, YouTube advertising formats.

The IAB has been revising the definitions. As video spreads across connected TV, social feeds, retail media and video podcasts, the old split between in-stream and outstream no longer covers every placement. The IAB said so when it published a new classification framework:

"The video marketplace has outgrown legacy definitions. As advertising expands across CTV, online video, social platforms, retail media, video podcasts, and emerging formats, the industry needs a shared language for planning, buying, selling, and measuring video."

Source: IAB, A New Standard for Classifying Video Advertising.

When we plan a campaign, a pre-roll is the one placement where the viewer has already decided to watch video, sound is usually on, and the screen belongs to your ad for at least a few seconds. That makes it closer to a TV commercial than to a feed ad, even when it runs on a phone.

Pre-roll vs mid-roll vs post-roll

On YouTube the creator decides whether mid-rolls appear, while pre-roll and post-roll are now bundled. YouTube's help page explains the change:

"We've removed the individual ad choices for pre-roll, post-roll, skippable, and non-skippable ads. Now, when you turn on ads for new long-form videos, we show your viewers pre-roll, post-roll, skippable, or non-skippable ads when appropriate."

Source: YouTube Help. For an advertiser, the takeaway is that inventory before a video is now the default on monetized long-form content, so pre-roll supply is wide. With that much inventory available, campaigns usually stall on creative quality and the number of variants.

Where pre-roll ads run in 2026

Pre-roll exists on many platforms at once. The same 15-second spot can appear in very different environments, and each one changes how the creative is judged.

YouTube and Google video partners. The largest single source of pre-roll inventory. Through Google Ads you buy skippable in-stream, non-skippable in-stream and bumper ads, and you can extend delivery to sites and apps in the Google video partners network. For production rules specific to the platform, see our YouTube ads production guide.

Connected TV and streaming apps. Ad-supported streaming services insert pre-roll before shows and films. The viewer is on a large screen, often lean-back, and cannot click. Here a pre-roll behaves like a broadcast spot, and production values are compared with real TV commercials. Our connected TV advertising guide covers that environment.

Twitch and live streaming. Pre-roll plays when a viewer opens a channel, which makes the audience young, gaming-heavy and very used to ads. We wrote about that audience in detail in a Twitch video advertising guide.

Publisher video players and programmatic. News sites, sports sites and apps sell pre-roll through programmatic exchanges. The technical glue is VAST, which the IAB describes this way:

"VAST is a Video Ad Serving Template for structuring ad tags that serve ads to video players. Using an XML schema, VAST transfers important metadata about an ad from the ad server to a video player."

Source: IAB, Digital Video Ad Serving Template (VAST). The IAB notes that the standard was "Developed by members of the IAB Digital Video Technical Standards Working Group" and that the revision includes "sophisticated delivery and tracking options for clients, the ability to select ads dynamically for insertion". In practice, VAST is why one master file can travel across hundreds of players, and why your agency or ad ops team will ask for specific encodes. If you are buying this way, read our programmatic video advertising guide before you brief production.

Skippable vs non-skippable pre-roll

The most important creative decision is whether the viewer can skip. It changes the script, the length and the way you pay.

Google's advertiser documentation describes skippable in-stream ads this way:

"Skippable in-stream ads play before, during, or after other videos, or before and during games on YouTube Playables on mobile devices. Viewers can skip the ad after 5 seconds."

And the non-skippable version:

"Non-skippable in-stream ads are 60 seconds or shorter, and play before, during, or after other videos. Viewers don't have the option to skip the ad."

Both quotes come from Google Ads Help, About video ad formats. The same page describes the shortest format:

"Bumper ads are non-skippable video ads lasting between 5 and 6 seconds that play before, during, or after another video."

Google's own guidance on when to choose each format is short. For skippable ads: "Use skippable in-stream ads when you have video content you'd like to promote before, during, or after other videos on YouTube and across websites and apps running on Google video partners." For non-skippable ads, the case is when "you want viewers to view the entire message without skipping your video." For bumpers: "Use bumper ads when you want to reach viewers broadly with a short, memorable message." We read them as production briefs as well: a skippable ad needs content someone would choose to keep watching, and a bumper needs a single idea.

YouTube's older help page on the non-skippable unit spells out what the viewer experiences:

"If a non-skippable video ad appears before a video, the viewer must watch the ad in full before the video will play. With TrueView in-stream ads, viewers can watch the ad in full or skip the ad after viewing it for 5 seconds."

Source: YouTube Help, Non-skippable video ads.

There is a detail worth knowing before you write a 45-second non-skippable script. The creator-side help page gives a tighter length for non-skippable ads served on YouTube content: "15 or 20 seconds in length, depending on regional standards. On TVs only, may be 30 seconds." (YouTube Help). So the advertiser rules allow up to 60 seconds, while in practice most YouTube non-skippable inventory is built around 15 to 20 seconds, with 30 seconds on TV screens. Planning a 15-second master is the safe default.

For the six-second format, our bumper ads guide breaks down how to script a full idea in that window.

How pre-roll ads are bought and billed

On skippable in-stream, Google's help page is specific:

"With CPV bidding, you pay when a viewer watches 30 seconds of your video, or the entire duration of the video if it's shorter than 30 seconds, or interacts with your video, whichever comes first."

Source: Google Ads Help. So a viewer who skips at second five costs nothing on CPV, so the first five seconds work as free brand exposure if you put the brand there. A viewer who watches 30 seconds is paid for, so the middle of the ad has to earn that money with a reason to act.

Non-skippable formats work the other way. Google notes that "Non-skippable in-stream ads use Target CPM bidding, so you pay based on impressions." Every impression is billed whether the viewer cares or not, so the full message has to land inside a short, fixed window. YouTube's creator help adds that these units "may generate higher CPMs than other ad formats on YouTube" (YouTube Help, Non-skippable video ads).

How each billing model translates into a creative brief:

Media cost is the buyer's or the agency's domain. Production has some say in how much of each billed second the viewer spends paying attention. For a broader view of what a spot costs to make, see how much a 30-second commercial costs.

Writing a pre-roll for the first five seconds

On a skippable pre-roll, the first five seconds decide everything. The viewer arrived to watch something else and their thumb is already near the skip button. Our production rule is to treat seconds zero to five as a standalone ad that must work even if nothing after it is seen.

Rules we apply on every pre-roll script:

• Brand early, not as a logo card. Show the product in use, the packaging, or a spoken brand name in the first two seconds. A logo slate at second one gets skipped; a product in a person's hand does not register as an interruption in the same way.
• Open on motion or a face. A static opening frame looks like a loading screen. Movement, a human face or a sound cue tells the viewer something has started.
• Name the viewer's problem fast. One line of voice over or on-screen text that describes a situation the viewer recognizes. Skip the throat-clearing intro.
• Design for sound on and sound off. Pre-roll on YouTube usually plays with sound, while pre-roll in some publisher players starts muted. Supers carry the key line in both cases. If you rely on voice, our commercial voice over guide covers casting and direction.
• Give a reason to stay. End the opening on a question or an unfinished action so that staying feels natural.
• Place the call to action twice. Once as a spoken or written line around the midpoint, once as an end card. Viewers who stay past 30 seconds are the ones who convert, and they need an instruction.

Safe areas matter more than most teams expect. Google's video spec page warns that buttons and overlays move by placement:

"Overlays, call-to-actions, and buttons may appear in different places depending on the format, campaign type, and screen."

Source: Google Ads Help, About video ad specs. The same page tells advertisers to keep "important elements like your logo, product, supers, and others" inside the safe area. Build that into the storyboard, not into a last-minute reframe in the edit.

Pre-roll creative checklist

Use this before you approve a script or a first cut. It is the same list our editors run against every pre-roll master.

Music clearance is the item that most often stalls a pre-roll after the edit is approved. Our sync license guide explains which rights a paid video ad needs.

Lengths and cut-downs: planning one shoot for every pre-roll slot

Most campaigns need several lengths, and the cheapest way to get them is to plan the cut-downs before filming. A 30-second spot shortened to 15 in the edit often loses its logic. A 15 and a 6 written as their own scripts, shot in the same session, perform better and cost little extra.

Sequencing the lengths is where pre-roll gets efficient. A common pattern is a 30-second skippable spot for a first exposure, followed by bumpers that remind the same audience of one idea from the longer cut. Frequency has a ceiling, though. When the same pre-roll runs too often, results decay; our ad fatigue guide covers how to spot it and when to rotate creative.

Common pre-roll mistakes

Recycling a TV spot unchanged. A broadcast commercial is built for a captive audience and often holds the brand until the end. As a skippable pre-roll, the brand never appears for most viewers. Recut the opening at minimum.

Writing for the full length only. Teams approve a 30-second script without asking what a viewer sees if they skip at five. If the answer is a mood shot and no brand, the campaign pays for reach it never gets.

One aspect ratio. A 16:9 master shown on a vertical phone loses most of its frame. YouTube does adapt video to the device, and its spec page says it "dynamically adjusts your video to fit the viewer's device without stretching or cutting off your content", but adapting a horizontal frame to a vertical screen still means a small image. Shooting with vertical framing in mind avoids that.

No variation for testing. Running a single pre-roll leaves no way to learn which hook works. Two or three openings on the same body give the media team something to optimize. Our creative testing guide explains how to structure those variants.

Ignoring disclosure rules for AI content. If a pre-roll uses AI-generated or AI-edited people or scenes, check local rules before launch. Google's spec page notes that "AI regulations in the European Union, India, and New York require that ads with certain AI-generated or edited assets include disclosures and/or labels that inform consumers that the ads were made with AI." Plan the label in the design so it does not look bolted on.

Measuring pre-roll performance

Measurement depends on the goal, and pre-roll can serve several.

Quartile data is the most useful number for an editor. If most viewers drop at the same second, the cut has a weak moment there, and a re-edit can fix it without a reshoot. For a framework covering the whole ad production process, see our video ad production guide.

One more thing for planners: YouTube now groups ads on long videos. Its help page notes that "two back-to-back video ads can occur when you turn on ads for your long-form video (at least 5 minutes in length)." YouTube's stated reason: "Ad pods help reduce interruptions for viewers of longer videos, resulting in a better viewer experience." Your pre-roll may play right after a competitor's, which is one more reason to put the brand early and make the opening visually distinct.

How a studio like Neverframe produces pre-roll ads

Neverframe is an AI-first production studio in Miami. We make four formats for brands and agencies: films, spots, social ads and avatars. Pre-roll work usually falls into two of them.

Spots. A 30-second spot with original script, storyboard, licensed music, sound design and voice over, delivered as a 4K master plus a vertical version. This is the backbone of a skippable or CTV pre-roll plan, and the 15 and 6-second cut-downs are scripted alongside it. A first version arrives in a few days and final delivery takes two weeks.

Social ads. Three 15-second ads with different hooks plus two 6-second bumpers, delivered in 9:16, 1:1 and 16:9 in two weeks. This set is built for testing: three openings for skippable placements, two bumpers for frequency.

Films. When the brand needs a 60 to 90-second story for long skippable placements or a launch, a brand film covers it, with an original screenplay, a cinematic score and cut-downs for social, delivered in three to four weeks.

Avatars. A digital double of a CEO can record new messages without new shoots, which suits pre-roll for B2B audiences, product updates and recruiting where a familiar face matters more than a production set.

Agencies can work with us white label through our partner program, with first versions in 72 hours. If you are planning a pre-roll campaign and want a spot, a set of social ads or a film built for the first five seconds, see the formats for brands or tell us about the campaign.

FAQ

What are pre-roll ads?

Pre-roll ads are video ads that play before the content a viewer selected, on platforms like YouTube, connected TV apps, Twitch and publisher video players. They can be skippable, where the viewer may skip after five seconds on YouTube, or non-skippable, where the viewer must watch the full ad. Bumper ads of six seconds are also a form of pre-roll. Because the viewer is waiting for something else, pre-roll creative has to show the brand and a reason to watch in the first few seconds.

How long should a pre-roll ad be?

It depends on the format. Bumper ads are six seconds. Non-skippable ads on most YouTube inventory are 15 or 20 seconds, with 30 seconds possible on TV screens. Skippable ads have no strict cap, and 15 to 60 seconds is common. A practical plan is a 30-second master with 15 and 6-second versions written as separate scripts and shot in the same session, so each length works on its own rather than as a trimmed copy of the longer spot.

What is the difference between pre-roll and mid-roll ads?

Pre-roll plays before the video starts, while mid-roll interrupts the video at an ad break. Pre-roll viewers have fresh attention but are impatient to reach their content, so the hook must be immediate. Mid-roll viewers are already invested in the content and less likely to leave, which can suit longer messages. On YouTube, creators choose whether to enable mid-roll ads on videos longer than eight minutes, while pre-roll and post-roll are turned on together when they monetize long-form videos.

Are skippable pre-roll ads worth it if people skip them?

Often yes, if the creative is built for it. On CPV bidding Google bills when a viewer watches 30 seconds, watches a shorter ad in full, or interacts, so a skip at second five is usually not billed. That makes the first five seconds an exposure that costs nothing on that bidding model, provided the brand and the main promise appear there. Viewers who stay past five seconds have chosen to watch, which tends to make them a better audience for the offer and the call to action.

How do you make a pre-roll ad people do not skip?

Open with motion, a face or a sound cue instead of a logo card, name the viewer's problem in the first line, show the product in use before second five, and leave the opening on an unfinished action that makes staying feel natural. Keep the key line on screen for muted players, respect the platform safe areas, and test two or three different openings on the same body. Rotate creative before it wears out, since the same pre-roll shown too often loses attention over time.