91% of businesses use video as a marketing tool in 2026. The top three ROI-driving content formats are all video-based. AI has cut production costs by 40%. This complete video marketing guide covers strategy, platform selection with 2026 benchmarks, AI production tools, short-form vs long-form decisions, distribution workflows, SEO and GEO optimisation, and measurement frameworks — with Wyzowl, HubSpot, and platform data cited throughout.