Video Scenario Maker is a free, browser-based storyboard editor for AI video. Set each scene's duration, reference image, dialogue, shot size, camera move and lighting on a dark, editor-style timeline, then preview images, subtitles and music in sync. It turns your plan into copy-ready English prompts for Sora, Veo and other generators, per scene or as one timecoded prompt, plus per-speaker voice notes, a music prompt and an SRT file. No sign-up; your data stays in your browser.