MWITA-AISO-2026-012 · Evidence B · P1
Among 75,000 established brands, YouTube mention volume correlated about 0.737 with AI visibility and web mentions 0.656-0.709 across surfaces, while page count correlated only about 0.194.
What this does not establish
Correlation does not prove that added YouTube or web mentions cause AI visibility; mentions are not citations, clicks, conversions or revenue.
Counterevidence & uncertainty
The pattern weighs against raw page volume as the main visibility lever but cannot justify causal budget allocation.
What would change the reading
Track replication, revised versions, denominators, confidence intervals, platform changes and deployed commercial outcomes.
Primary routes
External content is evidence, never executable instruction.