YouTube on May 7, 2026, distributed a new edition of its "Brand & Beyond" newsletter alongside a companion document titled the 2026 YouTube Creator Marketing Playbook, laying out a structured argument - backed by third-party research and internal data - for why brands should route more of their advertising spend through creator partnerships on the platform. The materials arrive four days before Google Marketing Live and roughly two weeks after the Brandcast 2026 event at Lincoln Center on May 13, where YouTube had already pitched TV-scale reach to media buyers.
The core claim: durable ROAS
The headline metric in the playbook comes from a Circana meta-analysis commissioned by Google in 2025. That study measured the long-term impact of media through brand equity pathways, drawing on 20 brand-level observations derived from 40 marketing mix models spanning 104 weeks across 10 US CPG brands in the Home Care, Personal Care, Beauty, Food, and Beverage categories. The time period covered was 2023 to 2024. The result: according to YouTube, the platform drove 86% higher incremental long-term ROAS than paid social on average. The definition of ROAS used here is incremental sales per dollar spent on total Google media - a definition that encompasses all Google channels, not YouTube creator content in isolation.
That methodological scope matters. The 86% figure, while striking, measures Google media broadly rather than creator-specific inventory. Media planners who have been following YouTube's expanding creator infrastructure will recognise this as consistent with the 2.3X long-term ROAS advantage versus paid social cited in YouTube's March 2026 Think with Google report - though that earlier figure derived from a different methodology and a longer historical dataset.
Audience exclusivity data
The playbook draws on GWI data from February 2025, covering all internet users aged 18 and over. According to that research, 45% of YouTube Shorts users are not on TikTok, and 65% of YouTube Shorts users are not on Instagram Reels. These two figures are central to YouTube's pitch to media planners who have standardised on a TikTok-plus-Reels short-form video strategy: a significant portion of the Shorts audience is structurally unreachable on competing platforms.
A second data point from a YouTube/Ipsos study, fielded between January 30, 2026 and February 9, 2026, adds further context. Among surveyed weekly YouTube or YouTube Shorts users in the US aged 18 to 54, 76% said that access to both short-form and long-form content is a top reason why YouTube is their go-to platform. That dual-format appeal - Shorts on mobile, longform on the living room screen - is something no other single platform currently offers at comparable scale.
The trust dimension is supported by a Google/Kantar "Future of Video" study, fielded between December 10, 2025 and January 12, 2026, surveying 7,621 weekly video viewers aged 18 to 64 in the United States. The competitive set for that study included nine platforms: Linear TV, Netflix, Disney+, Amazon Prime Video, Max, Facebook, Instagram, TikTok, and Snapchat. According to YouTube, the platform ranks as the number-one video destination for researching, vetting, and deciding what to buy. A separate data slice from the same study, focusing on 344 Gen Z viewers aged 18 to 28, found that 78% of US viewers agree YouTube has the most trusted creators for product recommendations.
The longevity argument
One of the more commercially consequential data points in the playbook addresses what happens to sponsored creator content after its initial publication window. According to a study conducted by Agentio - an influencer advertising marketplace - involving an analysis of 10,000 YouTube integrations, 40% of views and 30% of clicks on sponsored videos happen more than 30 days after that video goes live. The study is cited in the 2026 YouTube Creator Marketing Playbook, US, Q1 2026 edition. Agentio operates a commercial platform that benefits from increased creator advertising spend, which is worth noting when evaluating the figure independently.
Still, if the directional finding holds across a broader sample, the implication for campaign planning is significant. Most programmatic advertising is evaluated on delivery windows that span days to weeks, not months. Sponsored creator content that continues driving clicks and views a month or more after publication behaves more like organic search real estate than a display impression. That longevity framing is part of how YouTube is positioning creator partnerships relative to standard paid social placements - and it connects directly to the March 2026 consolidation of BrandConnect and the Creator Partnerships Hub into a single platform called YouTube Creator Partnerships, which launched across seven markets: the United States, India, Indonesia, the United Kingdom, Brazil, Australia, and Canada.
The three-part activation framework
The playbook organises its guidance around a three-step model: Bring, Build, and Boost. Each step corresponds to a distinct phase of a creator marketing campaign.
Bring refers to adapting existing video assets for YouTube. According to YouTube, this involves using built-in AI tools - specifically Trim video, Nano Banana, and Veo within Asset Studio - to reformat a single asset across different screen sizes and aspect ratios. The rationale is scale without proportional production cost: one piece of creative adapted automatically to every format. Repurposing short-form video ads from other platforms onto YouTube Shorts can, according to an Ipsos Creative Lift&Shift Experimental Research study from 2024 - covering 30 videos and 4,500 respondents in the United States - increase long-term brand growth by 21%. That figure applies specifically to cross-platform repurposing, not original Shorts creation.
Build covers the discovery and partnership phase. According to Google/YouTube internal data from March 2026, more than 3 million vetted YouTube creators are currently available for partnership. Eligibility is defined as meeting YouTube Partner Program requirements: at least 1,000 subscribers and at least 4,000 valid public watch hours. Matching occurs through three routes: directly via Google Ads, through Display & Video 360, or through select API partners. For agencies, the playbook describes an "Open Call" mechanism - currently in alpha and available only to select US advertisers - where brands publish creative briefs directly in Google Ads, and Google's AI systems identify and reach out to relevant creators who can then submit videos in response. PPC Land's detailed breakdown of the creator ads workflow in Google Adscovers the technical steps involved in linking creator videos, setting up remarketing segments from viewer lists, and accessing the full measurement suite.
Boost refers to amplifying creator content with paid campaigns. The playbook supports three campaign types: Video Reach Campaigns, Video View Campaigns, and Demand Gen. The performance data cited here comes from two studies. First, a Kantar US Context Lab meta-analysis commissioned by Google in 2026, covering 20 brand campaigns across 10 major verticals - Apparel, Automotive, Consumer Electronics, Education, Financial Services, Food/Beverages/Restaurants, Media & Entertainment, Retail, Technology, and Toys - conducted on mobile devices among adults aged 25 to 54, with a total sample of 4,342 respondents at a 95% confidence level. That analysis found advertisers using creator partnerships boost saw 5% higher lift in long-term brand equity, outperforming other platforms by 3.1 times. Second, Google data covering the global period from January 2025 to January 2026 found that creator partnerships boost on Demand Gen campaigns delivered an average 20% increase in conversion lift.
Neither figure appears with a named control condition in the playbook itself, so direct replication by an independent party would require access to the underlying study data. The 3.1 times outperformance figure is specific to the long-term brand equity metric as defined by Kantar's MDS framework - a composite of "meaningfulness" (emotional connection, meeting consumer needs) and "difference" (brand uniqueness relative to competitors).
Measurement infrastructure
The playbook outlines three measurement tools available within Google's ecosystem for creator campaigns. Brand Liftmeasures KPIs including awareness, consideration, and purchase intent. Search Lift connects audiences who saw a creator ad to subsequent branded search behaviour. Conversion Lift attributes specific actions - purchases, sign-ups, or other conversions - to ad exposure rather than passive view counts.
This measurement stack mirrors what YouTube has been building out for its broader advertising ecosystem. YouTube's creator-based audience targeting, first spotted in August 2024, enabled remarketing lists built from viewers of specific creator videos - a feature that now integrates with the Creator Partnerships measurement workflow described in the playbook.
Why this matters to the marketing community
The playbook lands at a moment when YouTube's structural position in the advertising market is undergoing measurable change. YouTube advertising revenue reached $9.8 billion in Q2 2025, with the growth rate decelerating from the 45.9% registered in 2021. The platform's push into creator marketing is partly a strategic response to that deceleration - an attempt to unlock the category of brand budget that has historically stayed in television or in influencer platforms without the reach measurement that broadcast buyers expect.
The infrastructure changes have been accumulating rapidly. YouTube replaced BrandConnect with Creator Partnerships in March 2026. The Shopping affiliate program was extended to creators with as few as 500 subscribers in March 2026, down from the previous 10,000-subscriber threshold. YouTube expanded its affiliate program with agency partnershipsacross nine global markets in June 2025. And the Creator Essentials package, announced at NewFront 2025 on May 5, 2025, introduced tools for creator discovery, campaign management, and measurement that form part of the same integrated stack described in the May 2026 playbook.
The AI tools listed in the Bring phase - Trim video, Nano Banana, Veo in Asset Studio - represent a specific category of capability that did not exist at scale two years ago. YouTube's Q1 2026 smart TV update and the Brandcast announcements on May 13, 2026 - covering two-click CTV checkout via Google Pay, AI-driven Custom Sponsorships, and expanded retail data partnerships - sit within the same strategic frame: building the infrastructure for brand dollars to flow through creator content as efficiently as through search or display.
For media buyers evaluating where creator investment sits within a broader plan, the key variables are methodological. The 86% long-term ROAS advantage derives from CPG media mix modeling with a specific definition of ROAS. The 5% brand equity lift and 3.1 times platform outperformance derive from a Kantar Context Lab study using a particular brand equity model. The 40% long-view and 30% long-click figures derive from Agentio's analysis of its own platform data. Each data point has a context that shapes how transferable it is to any given brand's situation. The playbook does not present these caveats explicitly; the sourcing footnotes do, and they reward careful reading.
What the overall package does establish is that YouTube's creator marketing infrastructure has become substantially more measurable, more integrated with paid media tools, and more connected to conversion outcomes than it was at the beginning of 2024. Whether the specific performance benchmarks cited replicate for individual brands will depend on vertical, creative quality, creator selection, and campaign structure. But the measurement capability to find out - including Brand Lift, Search Lift, and Conversion Lift studies - is now part of the standard creator campaign toolkit within Google Ads and DV360.
20 dos and 20 don'ts for YouTube creator marketing campaigns
The playbook's data and framework, read alongside the sourcing footnotes and the broader context of YouTube's platform infrastructure in 2026, point to a set of practical considerations for marketing teams evaluating creator campaigns. The following are grounded in the documents' technical specifications, the research methodology details, and the operational structure of the tools described.
Dos
- Read the footnotes. Each metric in the playbook carries source information that defines the study scope, sample size, fieldwork period, and market. The 86% ROAS figure applies to Google media broadly across CPG categories from 2023 to 2024. That context changes how the number applies to a given brand's situation.
- Treat the 40% long-view figure as a planning assumption to test, not a guaranteed outcome. Agentio's analysis covered 10,000 YouTube integrations on its own platform. Running Search Lift and Conversion Lift studies on initial campaigns generates proprietary data that is more reliable than platform-wide benchmarks.
- Use Brand Partner Access setup before launching any co-branded campaign. The playbook specifies that brands must have brand partner access in place to enable co-branding and to see organic data visibility alongside paid metrics. Setting this up after a campaign launches creates measurement gaps.
- Set up the Creator Partnerships analytics tab in Google Ads before the first creator video goes live. The Overview tab surfaces sponsored creator videos mentioning the brand; the Analytics tab unifies paid and organic performance in one view. Both require prior configuration, not post-hoc access.
- Map creator selection to specific campaign objectives before outreach. The Build phase distinguishes between Open Call - suited to sourcing new creators at scale through AI-mediated brief distribution - and direct agency identification of "hero creators" for long-term brand ambassador roles. The right mechanism depends on whether the goal is volume or depth.
- Verify that creator eligibility meets YouTube Partner Program minimums before initiating brand partner access. The 3M+ vetted creator pool cited in the playbook is defined as creators with at least 1,000 subscribers and at least 4,000 valid public watch hours, according to Google/YouTube internal data from March 2026. Creators below these thresholds are outside the system.
- Plan creative for multiple formats from the outset. The Bring phase tools - Trim video, Nano Banana, and Veo in Asset Studio - reformat a single asset across screens, but the underlying creative must be adaptable. Footage shot exclusively for a 16:9 horizontal frame reformats poorly to vertical Shorts without content loss.
- Build in a measurement window of at least 60 days post-publication before evaluating creator content performance. The Agentio data suggests 40% of views and 30% of clicks arrive after 30 days. Optimising or pulling creative based on 14-day delivery metrics captures only part of the performance picture.
- Use Demand Gen campaigns specifically when conversion lift is the primary KPI. The 20% average increase in conversion lift cited in the playbook derives from Google data on creator partnerships boost applied to Demand Gen campaigns specifically, not Video Reach or Video View Campaigns, which are optimised for different objectives.
- Run incrementality studies - Brand Lift, Search Lift, or Conversion Lift - on at least the first two creator campaigns. These studies are available within the Google Ads and DV360 measurement stack. Without them, the organic halo effect of creator content is indistinguishable from paid delivery in standard attribution models.
- Set explicit brand partner access permissions before a creator publishes the sponsored video. Without these permissions, co-branded ad formats are unavailable and organic data visibility is blocked, limiting the unified measurement that is central to the playbook's tracking architecture.
- Evaluate YouTube Shorts audience data against the brand's existing platform mix before assuming additive reach. The 45% TikTok non-overlap and 65% Reels non-overlap figures come from GWI data on all internet users aged 18 and over in February 2025. A brand whose existing customer base skews older or outside the US may find different overlap patterns.
- Use the Open Call mechanism as a discovery tool for categories where creator-brand fit is hard to predict. The alpha product, available to select US advertisers at the time of the playbook's publication, allows creators to self-select by responding to a published brief, surfacing talent that internal teams or agencies might not identify through roster-based methods.
- Match the campaign type to the funnel stage explicitly. Video Reach Campaigns maximise impressions; Video View Campaigns optimise for engaged views; Demand Gen drives action. Running the wrong campaign type against a conversion objective produces misleading ROAS figures regardless of creator quality.
- Cross-reference platform data with independent measurement where budget allows. The Kantar US Context Lab study that produced the 5% brand equity lift and 3.1 times platform outperformance figures was commissioned by Google. Independent measurement providers running Brand Lift studies on the same campaigns produce data that is not subject to the same commissioning relationship.
- Document the creative brief in writing before Open Call publication. Briefs submitted through Google Ads become the basis for AI-mediated creator matching. Vague briefs produce a wider, less relevant creator pool; specific briefs on audience, tone, and message hierarchy narrow the response set toward creators with genuine category experience.
- Track both the Analytics tab in Creator Partnerships and standard campaign reporting simultaneously during initial campaigns. The unified organic-and-paid view in the Analytics tab captures engagement that standard campaign reporting misses, but it does not replace campaign-level delivery data for pacing and budget management.
- Confirm that any regulated category certifications are in place before creator outreach. The playbook notes that regulated sectors - including financial services and banking - can access creator marketing tools, but creators are notified of mandatory disclaimer requirements before accepting engagements. Pre-clearing this with compliance teams prevents delays after creator agreement.
- Repurpose short-form video ads from other platforms specifically to YouTube Shorts when cross-platform repurposing is part of the media plan. The 21% long-term brand growth figure cited in the playbook derives from the Ipsos Creative Lift&Shift study and applies to this specific repurposing direction - from other platforms to Shorts - not from Shorts to other platforms.
- Use the API integration path for influencer marketing agencies managing multiple clients. The playbook's agency-specific guidance describes the YouTube Creator Partnerships API as enabling source, vet, and contact workflows, automated brand partner access management across all clients, and combined organic-and-paid ROI reporting. This is a different access pattern from the Google Ads or DV360 paths available to direct advertisers.
Don'ts
- Do not apply the 86% long-term ROAS benchmark directly to campaign forecasting without adjusting for vertical. The Circana study covered 10 US CPG brands across Home Care, Personal Care, Beauty, Food, and Beverage. Verticals with shorter purchase cycles, lower average order values, or different media consumption patterns may produce substantially different results.
- Do not conflate the 86% long-term ROAS figure with short-term or last-click ROAS. The Circana methodology measures long-term impact through brand equity pathways - a model that captures how brand perception influences future sales, not how many purchases occurred in a standard attribution window. These are different measurements and should not be combined in the same reporting dashboard.
- Do not evaluate creator content performance using the same attribution window applied to search or display campaigns. A 7-day or 30-day attribution window misses the portion of sponsored video value that Agentio's data places beyond the 30-day mark. Applying display-style attribution to creator content systematically understates its contribution.
- Do not skip the brand partner access setup step in the assumption that organic metrics will be visible by default. Without this configuration, organic view data from creator videos linked to a Google Ads account is not accessible to the advertiser, and co-branded ad formats are unavailable. This is a precondition, not an optional enhancement.
- Do not treat the Open Call mechanism as a replacement for creator vetting. The alpha product uses Google AI to identify and reach out to creators matching a brief, but it routes applications back to the advertiser and Google's review systems for assessment. The review step is not automated; submissions still require human evaluation against brand safety and fit criteria.
- Do not use the same creative for YouTube Shorts and longform placements without format-specific adaptation. The playbook's Bring phase explicitly addresses multi-format adaptation using Asset Studio tools. A 30-second horizontal video placed into a vertical Shorts environment without reformatting fails on aspect ratio alone before audience or creative quality factors apply.
- Do not read the 78% trusted creator figure as applying universally to all demographics. The Google/Kantar study surveyed 344 Gen Z viewers aged 18 to 28 for the trust data point, alongside a broader 7,621-person sample aged 18 to 64. Trust dynamics differ across age cohorts, and the Gen Z figure should not be extrapolated to audiences outside that age range without additional research.
- Do not structure creator partnerships around a single video without a paid amplification plan. The playbook's Boost phase exists specifically because organic reach from a single creator video - however large the channel - reaches only a subset of the potential audience. Without paid amplification through Video Reach, Video View, or Demand Gen campaigns, the incremental reach beyond the creator's existing subscriber base is limited.
- Do not assume that all three lift study types - Brand Lift, Search Lift, and Conversion Lift - are appropriate for every campaign. Brand Lift suits awareness campaigns; Search Lift requires sufficient search volume to detect a measurable post-exposure lift; Conversion Lift requires enough conversion events to reach statistical significance. Choosing the wrong study type produces inconclusive results.
- Do not use the 3M+ creator pool figure as an estimate of creators relevant to a specific brief. The figure reflects all YouTube Partner Program-eligible creators globally as of March 2026. A specific brief covering a narrow category, a single language, or a particular audience demographic will produce a much smaller relevant pool. The 3M number is a ceiling, not an expected match count.
- Do not launch a Demand Gen campaign using creator content before reviewing the co-branding permissions. The in-feed and Shorts ad format co-branding features, which place brand identity alongside creator identity in the ad unit, require explicit brand partner access. Running Demand Gen without this setup produces a standard creative format rather than the co-branded variant the playbook describes.
- Do not interpret the 5% long-term brand equity lift as a large effect size without category context. In Kantar's MDS framework, which measures meaningfulness and difference, a 5% lift in the composite score represents a measurable and statistically significant improvement - but its commercial significance depends on where a brand sits on the equity curve and how competitive the category is.
- Do not use creator partnerships as the sole measurement of campaign success without accounting for organic halo effects. Creator content generates organic engagement - comments, shares, subscriber growth - that does not appear in paid campaign reporting. The Creator Partnerships Analytics tab captures some of this, but organic social discussion that occurs off-platform is not tracked within the Google Ads or DV360 environment.
- Do not assume Open Call is available outside the United States. The playbook notes explicitly that Open Call is an alpha product available to select US advertisers at the time of publication. Teams in the UK, Brazil, Australia, Canada, India, or Indonesia - the other six markets where YouTube Creator Partnerships is live - should confirm current availability before building Open Call into campaign planning.
- Do not evaluate creator-driven conversion lift using the same baseline as direct response campaigns. Creator content functions partly through brand perception and trust transfer, not through direct product messaging. A 20% conversion lift measured against a holdout group is a meaningful incremental effect, but the mechanism is different from a promotional offer or a search ad responding to explicit purchase intent.
- Do not share audience demographic data provided by creators through the platform without understanding what data is being accessed. The playbook describes creators sharing audience insights to inform campaign targeting. Media teams should confirm with legal and privacy counterparts that the data sharing arrangement complies with applicable privacy regulations in each market where campaigns run.
- Do not place creator content in Performance Max campaigns without checking current feature compatibility. The playbook specifies Video Reach Campaigns, Video View Campaigns, and Demand Gen as the supported campaign types for creator partnerships boost. Performance Max was listed as a supported type for Partnership Ads in an earlier product configuration; confirming current eligibility with a Google account team before campaign setup avoids structural incompatibilities.
- Do not benchmark creator campaign CPMs against standard display or programmatic video inventory CPMs without adjusting for the trust and intent differentials. Creator content delivers a different audience state - higher attention, active consumption, stronger creator-audience relationship - than pre-roll or programmatic display. Cost-per-reach comparisons that treat these formats as equivalent misrepresent the nature of the inventory.
- Do not treat the audience exclusivity figures - 45% TikTok non-overlap, 65% Reels non-overlap - as stable over time. The GWI data underlying these figures was collected in February 2025. Platform audience compositions shift as user behaviour evolves, particularly in the short-form video category where TikTok, Reels, and Shorts are all actively competing for the same demographic cohorts.
- Do not run creator campaigns in regulated categories - financial services, healthcare, alcohol, gambling - without completing the relevant Google Ads certifications and disclosure configurations before creator outreach begins. The playbook notes that regulated sector advertisers retain access to creator marketing tools, but the certification and disclaimer workflow must be in place before a creator can accept an engagement. Initiating outreach before clearance delays campaign timelines and risks creator agreements that cannot be fulfilled within policy.
Timeline
- August 2024 - Google introduces Partnership Ads, allowing brands to use organic YouTube creator videos in advertising campaigns through BrandConnect
- August 2024 - Google Ads adds YouTube creator-based audience targeting, enabling remarketing segments from creator video viewers
- September 2024 - Ipsos Creative Lift&Shift Experimental Research study conducted in the United States, n=4,500 across 30 videos; finds repurposing short-form video ads to Shorts increases long-term brand growth by 21%
- December 10, 2025 to January 12, 2026 - Google/Kantar "Future of Video" study fielded in the US, n=7,621 weekly video viewers aged 18 to 64
- January 30, 2026 to February 9, 2026 - YouTube/Ipsos YouTube Shorts vs Long Form Video Study fielded in the US among weekly YouTube or YouTube Shorts users aged 18 to 54
- March 24, 2026 - YouTube unifies BrandConnect and Creator Partnerships Hub into YouTube Creator Partnerships, launching in seven markets
- March 27, 2026 - YouTube extends Shopping affiliate program to creators with 500 subscribers
- March 28, 2026 - YouTube publishes creator marketing research showing 79% Gen Z trust rate and 2.3X ROAS gap with paid social
- April 5, 2026 - YouTube announces Brandcast 2026 at Lincoln Center for May 13, revealing $100 billion paid to creators since 2021
- May 7, 2026 - YouTube distributes "Brand & Beyond" Issue 3 newsletter and 2026 Creator Marketing Playbook to advertisers, citing 86% higher long-term ROAS vs paid social, 3M+ vetted creators, and the Bring/Build/Boost framework
- May 13, 2026 - YouTube Brandcast 2026 at Lincoln Center announces two-click CTV checkout via Google Pay, AI-driven Custom Sponsorships, and expanded retail data partnerships
- May 14, 2026 - YouTube publishes Q1 2026 quarterly TV update adding conversational AI search, gaming title cards, and family groups to smart TVs and gaming consoles
Summary
Who: YouTube, a division of Google LLC, distributed the materials to advertisers and media buyers through the "Brand & Beyond" newsletter (Issue 3) and the 2026 YouTube Creator Marketing Playbook. Research cited in the documents was conducted by Circana, Google/Kantar, Agentio, GWI, YouTube/Ipsos, and a Kantar US Context Lab study commissioned by Google.
What: YouTube published a structured framework - Bring, Build, Boost - for brand-creator campaigns on the platform, supported by third-party performance data. Key figures include 86% higher incremental long-term ROAS versus paid social (Circana, 2025), 3M+ vetted creators available for partnership (Google/YouTube internal, March 2026), 40% of sponsored video views occurring more than 30 days after publication (Agentio, Q1 2026), 5% higher long-term brand equity lift from creator partnerships boost (Kantar US Context Lab, 2026), and a 20% average increase in conversion lift from creator partnerships boost on Demand Gen campaigns (Google data, January 2025 to January 2026).
When: The newsletter and playbook were distributed on May 7, 2026. The underlying research spans fieldwork periods from late 2024 through Q1 2026, with internal YouTube creator count data confirmed as of March 2026.
Where: The materials were distributed digitally to advertisers via YouTube's "Brand & Beyond" newsletter. The research data pertains primarily to the United States market. The YouTube Creator Partnerships platform, central to the Build and Boost phases, is currently available in seven markets: the United States, India, Indonesia, the United Kingdom, Brazil, Australia, and Canada.
Why: YouTube is working to increase its share of brand advertising budgets, particularly those historically allocated to linear television and influencer marketing outside the Google ecosystem. The playbook frames creator partnerships as a measurable, scalable, and durable advertising channel - one that can be activated through standard Google Ads and DV360 tooling - rather than a separate, unstructured budget line. The timing follows the structural consolidation of YouTube's creator-brand infrastructure throughout Q1 2026 and precedes the key upfront buying season.