AdTech Europe

Buying video supply: in-stream checks and OMID viewability

Video is where buyers most often pay for placements that aren't what they claim — "in-stream" ads that run in tiny or hidden players. The Video Signals & OMID plugin ($2,500) addresses this.

What it checks

  • Strict in-stream checks — real in-stream placements only.
  • Video placement types — in-stream versus other placements identified.
  • Player size and placement checks.
  • OMID viewability — Open Measurement viewability that buyers trust.
  • Video reports.

Why it matters for your advertisers

Video CPMs are higher than display. If part of the budget lands in placements that don't meet in-stream rules, cost per real view rises fast. Measured viewability lets you show advertisers what they actually got.

Formats on the platform

The DSP buys in-stream and out-stream video, and connected TV placements. Release v8.3 also added video ads for TikTok and YouTube through the channel connectors.

Good practice

  1. Separate in-stream and out-stream into different campaigns — they perform differently.
  2. Judge video by cost per completed or viewable view, not just CPM.
  3. Use a curated or whitelisted list for brand video.

Partner availability, inventory access, formats and regional coverage may vary based on account requirements, approval processes and integration agreements.

Related: Ad formats and creative specs · Traffic quality reporting

Nov 13, 2026

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