How long should an explainer video be? I believe your video should be as long as it needs to be to say your message. We worry a lot about attention spans. But people binge-watch Netflix for hours. They devour YouTube videos and documentaries. If something is engaging, we stick around. Personally, I like to keep videos under 3 minutes. When you know you’ve got limited time, you cut the fluff and stay focused. But if your message needs longer, go for it. Just make it worth watching.