The article draws on BrightEdge data to show that for e-commerce searches, YouTube is now the top-cited source in AI-generated search overviews — appearing in 6.9% of tracked e-commerce AI Overviews, nearly three times more than any other non-brand domain. This shift signals growing importance of video content and multi-source citations once AI enters search, and stresses that brands must expand beyond traditional SEO to include video, structured data, and multi-format content to maintain visibility in the evolving landscape.