Marques Brownlee, YouTube's top tech reviewer, showcases his state-of-the-art studio and $250,000 mechanical arm for swoopy camera pans in gadget reviews. YouTube's dominance among young people has given rise to new tech reviewers like Brownlee, who has more subscribers than major news outlets combined. Brownlee's influence in the tech ecosystem has led to lucrative opportunities, including sponsorships, ad revenue, and merchandise sales.