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Open Flow in a supported browser and sign in with an eligible Google account. Check regional access and the credit allowance for your plan before beginning a project. Describe the scene, subject, movement, and visual style you want, and add source images when the chosen generation mode supports them. Select a compatible model and review its credit cost in settings. Generate an initial clip, inspect the visual and audio result, then refine the prompt or use the available editing tools. Organize useful outputs in the project and build scenes from selected clips where supported. Review continuity, text, product details, and export settings before sharing the work. Keep track of generation costs as you iterate, since quality tiers and different models can consume different amounts of credit.