Observed Signal · Jan 15, 2026 · Weekly Digest / Trend Roundup · Source: VideoWeek · Impact: 3/5 · Sentiment: Neutral
Agentic AI Reshapes Products; YouTube Shorts Growth; UK Publishers
This Week in Charts summarizes broad trends in adtech and media. Agentic AI is reshaping how products and services are developed, while YouTube short-form videos continue to gain traction, with 77% of views attributed to clips under one minute and long-form views shrinking to 4.08% in 2025. UK digital publishers posted 4.24% year-over-year revenue growth in Q3 2025, though half of participants reported declines, suggesting growth is concentrated among a subset of publishers. In the US, 61% of households rely on smart TVs as their primary streaming device. A EMARKETER/Zeta Global survey finds 78% of marketers expect martech/ads tech convergence within three years, but latency, data incompatibility, and silos remain barriers. The article also tracks stock moves and notable moves in adtech and TV, including Stagwell’s SPORT BEACH unit, a Paramount-WBD bid context, and Criteo’s stock uptick amid Robeco’s increased stake.
Broad industry trend roundup with multiple signals across AI, short-form video, and publisher revenues; not a single event
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Key Takeaways & Evidence Grounding
- Short-form videos under one minute accounted for 77% of total YouTube views in 2025; long-form (20+ minutes) share fell to 4.08%.
- UK digital publishers' revenues rose 4.24% YoY in Q3 2025; 50% of participants reported declines.
- 61% of US households use smart TVs as their primary video streaming device (up from 39% in 2021).
- EMARKETER & Zeta Global survey: 78% of marketers expect full convergence of martech and adtech within three years; barriers include latency, data incompatibility, and organizational silos.
- Stagwell launched SPORT BEACH; Paramount takeover bid rejected by Warner Bros. Discovery; Criteo stock rose as Robeco increased its stake.
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Week in Charts: Starbucks Cuts Marketing Spend, YouTube Nears 30B
This edition highlights three main themes in adtech: YouTube’s growing video volume driven by Shorts and AI-generated content, rising industry concern about AI replacing marketing procurement roles, and notable stock moves in ad-tech firms. Omdia reports YouTube has reached 29 billion total videos as of December 2025, with rapid growth over the last decade, fueled by Shorts, AI content, and expanded markets like India. The World Federation of Advertisers notes increasing anxiety among procurement leaders that AI could displace jobs, with concern rising from 13% (Dec 2024) to 46% (Dec 2025). Dentsu’s CMO Navigator finds 96% of Latin American CMOs reporting revenue gains in the past year. S4 Capital’s shares jumped 47% after upgrading guidance for full-year 2025, while broader market moves reflected ongoing AI and ad-spend dynamics affecting agencies. The piece encapsulates ongoing shifts in platform activity, measurement, and funding shaping the AdTech landscape.
Week in Charts: CTV Shares, Retail Media Shift, AI Ads
VideoWeek’s 'Week in Charts' highlights industry data and market moves: Pixalate data shows Samsung held the largest share of open programmatic CTV impressions in the UK (31%) in Q1 2026 while Roku led the US (36%), with Amazon Fire TV second in both markets. eMarketer forecasts China’s share of global retail media ad spend to fall from 44% (2026) to 42% by 2029 while the rest of the world rises from 20% to 22%; the US is expected to remain at ~36%. An IAB UK/MTM survey found half of UK consumers comfortable with AI-generated background images, but a majority uncomfortable with fully AI-generated people in ads. TiVo research shows in-car video is most commonly used to entertain children and is watched more often when parked (41.8%) than moving (31.7%). The piece also summarises recent stock movements affecting adtech and media companies.
CTV & AI Growth; Video to Counter AI Threat
Week in Charts flags CTV and AI as the main growth areas in IAB Europe’s Attitudes to Digital Advertising, with agencies (76%), publishers (54%), and ad tech (81%) naming CTV and 60% of advertisers citing AI as growth drivers. Reuters Institute notes publishers will focus more on video in the AI era, citing declines in traffic referrals from AI search results. Ampere Analysis forecasts global content investment reaching $255 billion in 2026, up 2% from 2025, led by streaming with spend rising 6% to $101 billion while broadcasters stagnate or decline. CoComelon tops end-of-year video streams, led by The Wheels on the Bus, with Bruno Mars songs in second and third and Golden from Netflix’s KPop Demon Hunters in fourth. The Week in Stocks section highlights movements in Roku, The New York Times, and Adobe, and the piece weaves in signals around AI, M&A, pricing, and measurement shaping the ad tech and video ecosystem.
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