Google Merges YouTube Shorts With Open Web Video Buys in DV360

Google will allow advertisers to purchase YouTube Shorts inventory alongside open web video placements inside DV360, its demand-side platform, the company announced at Programmatic IO in New York City on Monday.

The new Unified Vertical Video strategy integrates YouTube Shorts supply with third-party publisher video into one buying workflow inside DV360. Gemini, Google's AI system, handles creative resizing across vertical and horizontal formats and manages how campaign budgets split between Shorts and non-Shorts inventory.

What changed in the buying process?

Before the announcement, advertisers could purchase YouTube Shorts only through Google Ads using Demand Gen, which combines inventory across Google properties, or Performance Max, Google's black-box optimization engine. Open web video remained a separate transaction, accessed through Google AdX or independent SSPs.

The integration removes that split. Sell-side consultant Scott Messer wrote on LinkedIn that the move "should help extend a portion of walled garden video budgets to the open web."

What does the shift mean for practitioners?

Agency teams running DV360 for existing YouTube buys now gain a path to open web video without provisioning a second seat. Smaller advertisers without DV360 access continue to buy Shorts only through Demand Gen and Performance Max inside Google Ads.

The unified workflow gives buyers a single reporting surface across Shorts and third-party video. Campaign pacing, frequency caps and creative variants operate across both inventory pools for the first time.

What risks do buyers need to monitor?

Messer also cautioned that "whether Gemini's optimization ends up diluting CPMs for both YouTube Shorts and open web inventory remains to be seen." A Gemini-managed budget split introduces an opaque variable into CPM forecasting, since the algorithm decides each impression's share without buyer override.

Media buyers should pressure-test early campaign data against historical Shorts-only and open-web-only baselines. Sustained CPM compression in either pool would signal that Gemini is steering spend toward whichever inventory is cheaper at that moment, not the inventory the buyer intended.

Where does Shorts fit in the vertical video market?

Google has not disclosed Shorts-specific reach figures within this announcement. YouTube competes for attention against TikTok, Instagram Reels and LinkedIn video, each running its own DSP integrations.

Advertisers have historically managed those budgets in silos. The unified DV360 workflow represents Google's first formal attempt to cross that line without sending dollars outside its owned buying stack.

How does AI oversight affect this rollout?

The reliance on Gemini for budget allocation follows a wider pattern of automated ad buying. Meta's automated ad platform has experienced repeated issues with ad delivery and budget pacing, and its chatbot AI has not resolved them.

A human reviewer inside the DV360 dashboard can still pause, adjust or override Gemini's allocation at the campaign level. Whether that override proves responsive enough to catch CPM drift within a single flight remains an open question.

What comes next for vertical video buying?

The rollout signals Google's intent to keep Shorts dollars inside its owned buying tools rather than cede them to external SSPs. Independent demand-side platforms now face a more unified Google offering during upfront discussions and annual planning cycles.

Whether the unification truly expands open web spending or simply relabels existing walled garden buys as cross-channel will become clear within two reporting cycles. Gemini's optimization logs, once shared with agencies under transparency terms, will determine which narrative holds by year-end.