IAB Redefining Media Types Standard targets automated video ad transparency

Standardizing definitions is critical as media buying shifts toward automated agents that lack human intuition for inventory nuances. By moving away from legacy tech-centric labels to experience-based buckets, the IAB aims to fix the fragmented reporting that plagues cross-platform campaigns. This shift helps buyers ensure that premium CTV spend isn't diluted by mobile social video incorrectly tagged as television. For the ecosystem, this is a necessary step toward unified measurement and programmatic efficiency in high-stakes environments like retail media and live streaming. Watch for the finalized specification later this year and its subsequent integration into IAB Tech Lab’s OpenRTB bid requests.

Additional context. The RMT Standard is part of or intended to inform several larger technical shifts at the IAB Tech Lab. Per MediaPost (July 2026), the framework is designed to feed into the IAB Measurement Center's Project Eidos, an initiative aimed at creating a universal taxonomy for cross-media measurement. This operational alignment is intended to resolve long-standing friction in the bidstream, where legacy fields often failed to distinguish between a high-value CTV impression and a social video view on a mobile device.

Parallel efforts are already underway to modernize technical delivery alongside these definitions. In April 2026, the IAB Tech Lab released new OpenRTB attributes specifically for live events to clarify whether content is a real-time livestream or a first-run broadcast. Furthermore, per IAB Tech Lab (July 2026), the Digital Video and CTV Ad Format Guidelines were recently updated to address modern workflows such as server-side ad insertion (SSAI) and adaptive bitrate streaming. These combined standards signal a move toward more granular, metadata-rich transactions intended to support the growth of premium programmatic video.

The urgency for these standards is underscored by the maturation of emerging formats like video podcasting. According to MediaPost reporting from July 2026, Apple Podcasts expanded its HLS video support earlier this year with several major hosting partners. The IAB’s new taxonomy aims to provide the stable foundation needed for such platforms to scale ad revenue by giving buyers a clear, standardized way to categorize this inventory alongside traditional streaming and online video.