How to Use Google Flow for AI Video (Complete Walkthrough)

Flow is Google's AI filmmaking tool, built on top of Veo 3 and Imagen. Where the Gemini app gives you a prompt box, Flow gives you shot management, character consistency and scene extension. If you are making anything longer than a single clip, this is the interface that matters.

The four tools

Text to Video

The baseline. You write a shot description, Flow generates video with audio. Everything about prompt structure applies here — subject, action, camera, setting, lighting, audio.

Frames to Video

You supply a starting image, and Flow animates from it. This is the highest-control option available, because you have settled composition, colour and character appearance before any video is generated. When output quality matters, start from a frame.

Ingredients to Video

You give Flow reference images — a character, a prop, a location — and it carries them into the generation. This is the answer to character drift. Without references, the same described person changes face between clips. With them, they hold.

Scene Builder and Extend

Scene Builder chains shots into a sequence. Extend continues an existing clip past its original length, using the final frames as the jumping-off point. Chaining several extensions is how you get past the short clip limit — with the caveat that quality degrades as you get further from the original.

Building a consistent sequence

The workflow that produces coherent multi-shot output:

1. Lock your ingredients first. Generate or upload the character and key locations before any video work. Everything downstream depends on these.
2. Write the full shot list. Six shots of eight seconds is roughly a minute. Know what each one does before generating.
3. Generate establishing shots first. They set the visual grammar — lighting, palette, lens feel — that later shots should match.
4. Use Frames to Video for anything critical. Settle the image, then animate.
5. Extend sparingly. One extension is usually clean. Three stacked extensions drift.

Credits and cost

Flow runs on a credit system tied to your Google AI plan. Generations cost credits whether or not you keep the result, which makes prompt discipline a direct cost saving.

Two habits that meaningfully reduce spend: test concepts at lower quality settings before committing to a final generation, and fix failed prompts rather than rerolling them. A reroll of unchanged text usually reproduces the same failure.

Where Flow fits

Flow handles generation and rough sequencing. It is not an editor. Text overlays, music, precise cuts and colour grading belong in a real editing tool afterwards. Treat Flow as the camera, not the cutting room.