India OTT platforms self-report campaign delivery data to advertisers: impressions served, video completion rate, reach (unique device count), and audience demographic breakdown based on registered user data. This self-reported data is the primary source of truth for most India CTV campaigns. Third-party measurement is available but incomplete, especially for audience composition measurement beyond impression quality.
What platform self-reported data covers reliably
India OTT platforms generally report accurately on delivery metrics: total impressions, video completion rates at quartiles (25%, 50%, 75%, 100%), content genre, and device type breakdown. These are generated from the platform own ad server and are consistent and sufficient for basic campaign accountability. Reach (unique device count within the platform) is also generally reliable — platforms accurately count unique device IDs that received at least one impression.
Where platform data is less reliable
Demographic audience composition is where self-reported data deserves scrutiny. Platforms attribute demographics based on registered user profiles that users provided at account creation. These profiles: (a) may be inaccurate (users fill in incorrect ages to bypass restrictions); (b) do not account for co-viewing (a 35-year-old registered user may watch with their entire family); (c) are not independently validated. When a platform reports your campaign reached 70% of 25-44 year olds and 55% male, this reflects registered account demographics, not a verified measurement of who was actually watching.
Third-party measurement in India OTT
IAS and DoubleVerify offer impression validity measurement for India OTT/CTV — verifying impressions were delivered to real devices and valid apps — but do not verify audience demographics. Nielsen Digital Content Ratings covers some India OTT platforms for content audience measurement but is separate from ad campaign measurement. The practical standard in 2026: require IAS or DoubleVerify post-campaign reports for impression quality; accept platform-reported demographics as indicative rather than audited; and use brand lift research to independently validate that your target demographic was reached and recalled the ad.