VPAID-ctv-blocked

Q: How do I fix the VPAID error "VPAID-ctv-blocked"?

For CTV inventory, use a standard MP4 video element with no VPAID. For interactive CTV creatives, use SIMID 1.2 with a sandboxed web view — check with the specific platform for SIMID support status.

VPAID is blocked on most CTV and streaming platforms

WarningCompatibilityIAB Tech Lab CTV/OTT Addendum 2024, IAB VPAID 2.0 deprecation notice

VPAID requires a browser-based JavaScript runtime. Native CTV players on Roku, Apple TV, Amazon Fire TV, Samsung Tizen, and LG webOS do not provide a shared JavaScript context for ad creatives. These platforms either silently drop the VPAID ad unit (resulting in a blank slot) or reject the VAST tag outright. If your VAST tags are served to CTV inventory, a VPAID will fail on the majority of impressions. vastlint flags VPAID as a warning on all tags and as a higher-severity issue when CTV-specific signals (e.g. ) are present.

How to fix

For CTV inventory, use a standard <MediaFile> MP4 video element with no VPAID. For interactive CTV creatives, use SIMID 1.2 with a sandboxed web view — check with the specific platform for SIMID support status.

Check your VAST tag for VPAID-ctv-blocked and other issues instantly.Validate a tag →

Other Compatibility rules

VPAID-no-video-fallbackNo MP4/video fallback alongside VPAID <MediaFile>

← All VPAID rules SIMID rules (migration target) →