IAB opens 30-day comment period for unified video classification standard

The standard addresses a fundamental structural mismatch where legacy classifications describe platforms like CTV or FAST rather than user orientation. By shifting from distribution-based labels to behavioral buckets, the IAB aims to eliminate planning friction and measurement inconsistencies across fragmented environments. For publishers, this provides a mechanism to protect premium inventory pricing through auditable, impression-level signals like 'sound-on' or 'focused intent.' Success hinges on universal adoption within the OpenRTB protocol to ensure the strategic 'lean-back' bucket aligns with technical bid requests. Watch for the final specification release in Q4 2026 following this feedback period.

The Redefining Media Types Standard is the latest building block in a multi-year effort by the IAB and IAB Tech Lab to modernize programmatic infrastructure. In May 2026, the IAB released Campaign Data Standards 1.0 under the Project Eidos initiative—the same umbrella housing the current video proposal. Per MediaPost (May 2026), that first release focused on foundational taxonomy for 'Ad Type' and 'Ad Inventory' to solve the 'reconciliation nightmare' that occurs when agencies and broadcasters use conflicting naming conventions. These efforts respond to an IAB 'State of Data 2026' report which found that over 60% of buy-side leaders distrust current measurement transparency.

Technically, this work aligns with the IAB Tech Lab’s update to video placement definitions via the 'plcmt' attribute in February 2025. Per PPC Land (February 2025), that update clarified four distinct categories—instream, accompanying content, interstitial, and standalone—effectively narrowing the 'instream' label to content where the user has clear intent and sound is on by default. Broad market testing of these signals in early 2025 led many DSPs to begin enforcing the stricter 'plcmt' requirements to prevent low-value outstream video from being priced as premium inventory.

Furthermore, the IAB Tech Lab finalized its Programmatic Auction Definitions in late June 2026. According to IAB Tech Lab (June 2026), this document established a 12-step standardized workflow for programmatic transactions, from inventory setup to final reconciliation. By interlocking these auction definitions with the new Redefining Media Types Standard, the industry aims to create a fully traceable supply chain. This transparency is increasingly vital as publishers adopt emerging CTV formats; for instance, many are integrating the pause and menu ad standards released in December 2025 to capture programmatic demand for non-linear ad placements.