When video lifts conversion
Wistia's data on millions of plays shows landing pages with explainer video can lift conversion 80%+ — but only when the video addresses a real comprehension gap. If your product is genuinely hard to explain in a sentence (think: workflow automation tools, complex B2B SaaS, novel categories), video helps. If your product is recognizable (analytics, CRM, project management), video adds friction without comprehension gain.
The placement decision
Never replace the hero with a video. Visitors form judgments in 50 milliseconds — a video player loading is dead space they can't read. Place the video below the hero, with a strong poster image (the most informative frame), captions baked in, and lazy-loading so the page renders fast. Embed via a privacy-friendly platform (Wistia, Mux, Vimeo Pro) — YouTube embeds drag down LCP and add tracking baggage.
The mobile asterisk
On mobile, video plays need a tap, autoplay is muted, and bandwidth is variable. If your traffic is more than 60% mobile, prioritize a strong static hero with a clear product screenshot over a video. Test your performance before and after adding video — if LCP moves past 2.5s, the conversion gain from the video is wiped out by the speed loss.