Observed Signal · Sep 2, 2026 · Interview · Source: VideoWeek · Impact: 2/5 · Sentiment: Positive
Dentsu's James Wilby: CTV Undervalued for Short-Term Sales
In a VideoWeek interview, James Wilby, Head of AV Trading at Dentsu, argues that the advertising industry underestimates CTV and premium video as channels for driving short-term sales. He says premium video is often benchmarked only against brand-building metrics, while performance budgets could also benefit if the right cost structures and measurement are in place. Wilby describes rising ecosystem complexity, including 'co-exclusivity' across buying routes, and says agencies now act more as navigators than simple media buyers. Dentsu's Total AV team handles CTV and big-screen video, and the agency has developed 'YouTube Fit for TV' to create a curated marketplace for YouTube inventory. Dentsu is also evaluating all its video partners to understand how content quality, audience data, screen size, attention and ad clutter affect client KPIs, moving beyond reach and frequency toward outcomes such as sales uplift, search activity and app downloads.
Insightful perspective from a major agency on CTV's role in performance marketing, but no concrete industry-changing event or announcement.
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Key Takeaways & Evidence Grounding
- James Wilby, Head of AV Trading at Dentsu, was interviewed by VideoWeek on September 2, 2026.
- Wilby argues that premium video and CTV are underestimated as channels for driving short-term sales.
- Dentsu's Total AV team plans and buys CTV and big-screen video across broadcast, linear, BVOD, streaming and CTV platforms.
- Dentsu developed 'YouTube Fit for TV', a curated marketplace for YouTube video built with broadcast and premium video partners.
- Dentsu is evaluating all its video partners to identify which environmental factors drive the best campaign outcomes.
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Related Market Signals & Shifts
Recent verified developments and strategic activity across this market segment.
Dentsu: Advertisers Underinvesting in Video
Dentsu published a new study, The Brand Reset, which finds that digital video advertising — including short-form formats — can deliver multi-year brand-building effects and should be taken more seriously by advertisers. The research, building on Dentsu’s Attention Economy work, estimates that a single video-ad exposure can increase sales by an average of 1–5% over the following three years. It also reports that Connected TV performs comparably to linear TV for brand objectives and that attention boosts brand impact but shows diminishing returns after roughly 20 seconds. Dentsu argues many marketers have under-invested in video because of a bias toward performance spend, and the report has been positioned by contributors as re-legitimising long-term brand investment in digital video.
Video Dominates ROI, Leaving Linear TV Behind
Bicycle’s Head of AV, Dylan Pritchard, says the agency has shifted toward a video-first strategy as new measurement tools and attribution models show video delivers higher ROI than linear TV. In a VideoWeek interview he credits platforms such as The Trade Desk and Amazon DSP for enabling programmatic, PMP-level video buying and says solutions like Adalyser and MMM have validated video’s performance for both brand and direct-response campaigns. Pritchard highlights operational concerns in CTV supply — widespread reselling and lack of inventory transparency — and warns UK broadcasters risk losing audiences and ad revenue to tech-native streamers like Netflix. He also describes agency role changes (advisory, integrating AV and programmatic teams) and emphasises unique reach and measurement as key metrics when planning video and CTV buys.
Agencies Push Agentic Media, Address Client Rogue Fears
At Advertising Week, media agencies are advancing agentic advertising initiatives while addressing client concerns about rogue AI activity. Dentsu's Carat partnered with NBCUniversal, Freewheel, and Newton to launch a planning, buying, and optimization agent for upfront investments, with a luxury retail client already using it. Tinuiti launched a 'Bliss Point Model Context Protocol (MCP) Server' to integrate measurement with AI agents. Stagwell relaunched Assembly as Stagwell Media with its agentic system Machine OS. Executives emphasize human oversight, governance, and approval thresholds to build trust. Additionally, the article discusses the importance of 'moments' in commerce media, with examples from ExxonMobil, Dollar General, and Pepsi's Nordic campaign with Wolt.
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