From One Brief to a Finished Edit

An AI video agent does the parts of video production that used to be manual: planning the shots, choosing the models, generating each clip, and sequencing them into an edit. What it cannot do is decide what you want. That is still your job, and it comes down to two things — a brief the agent can act on, and good judgment at the moments it hands control back to you. This guide is about doing both well, with concrete examples and a troubleshooting table, so you get a usable edit on the first pass instead of the fifth.

If you have never used the video agent before, the short version is this: you describe the video, it asks a few questions, it plans and generates, and you refine. The quality of what comes back tracks the quality of your brief far more than any single setting — so we start there.

The loop in five stages

Every run moves through the same five stages, and knowing them tells you where you have influence.

• Brief. You describe the video in plain language.
• Clarify. The agent asks about aspect ratio, duration, and style, each with a default.
• Plan. It writes a shot list — the structure of the final video.
• Generate. It creates reference stills, then animates them into clips.
• Assemble. The clips land on a timeline you can refine.

You have the most leverage at brief and clarify, because everything downstream inherits those choices. You have a second, smaller lever at assembly, where you refine. The middle stages run on their own.

Stage 1: writing a brief the agent can act on

A weak brief is a single noun. A strong brief gives the agent a subject, a setting, a mood, and a purpose. The difference shows up immediately in the output.

• Weak: "a coffee ad."
• Strong: "a cozy morning ad for a ceramic coffee dripper, someone brewing on a sunny kitchen counter, vertical, around ten seconds, warm and calm, hook on the first pour."

The weak version forces the agent to guess every creative decision; the strong version gives it a world to build. Four things are worth always including:

• Subject and setting — not "a runner" but "a runner on a wet city street at dawn."
• Mood — "calm and warm" versus "high-energy and punchy" changes pacing, lighting, and motion.
• Purpose — "for a product teaser" versus "for an explainer" tells the agent how to structure the shots.
• Length and orientation, roughly — you will confirm these next, but stating them early shapes the plan.

You do not need to describe individual shots. That is the agent's job, and over-specifying fights its planning. Give it the brief; let it direct. For prompt-level craft inside each shot, writing prompts that work goes deeper than there is room for here.

Stage 2: steering the clarifying questions

This is where users rush and then wonder why the output missed. The questions are short on purpose, but each one changes the result:

• Aspect ratio decides composition. 9:16 frames a subject tightly for mobile; 16:9 leaves room for a wide establishing look.
• Duration decides rhythm. A 6-second cut is one beat; 15 seconds gives the agent room for an arc.
• Style decides everything visual. "Handheld, slightly imperfect" and "smooth cinematic" produce completely different videos from the same brief.

Accepting the defaults is fine for a quick draft. When the video matters, spend the ten seconds to set these deliberately — it is cheaper than regenerating.

Stage 3: reading and refining the shot plan

The shot list is the most useful artifact the agent produces, because it is where you catch a wrong turn before any rendering happens. Read it like a storyboard. Does it open on a hook or an establishing wide? Is there a payoff shot? Are there too many shots for the duration? Adjusting the plan here costs nothing; adjusting after generation costs a re-render.

Stage 4: keeping characters and products consistent

Consistency separates a real video from a set of unrelated clips, and the agent handles it with reference stills. It generates a reference frame with the image model that locks the look, then reuses that reference so a face, outfit, or product stays the same across shots. If you have a real subject — an actual product photo, a specific character design — provide it as the reference and the agent builds around your asset instead of inventing one. Then the animation model turns each consistent still into motion.

Stage 5: refining the assembled edit

When the agent assembles the timeline, treat it as a strong first cut, not a final master. The high-value refinements are usually small: re-render the one shot that drifted, trim a beat that runs long, swap the opening frame for a punchier hook. Because the agent works shot by shot, you can fix a single clip without rebuilding the whole video — the practical advantage of a planned sequence over one monolithic render.

A full walkthrough, one brief end to end

Take the coffee-dripper brief above. The agent asks three questions; you set 9:16, 10 seconds, "warm handheld." It returns a four-shot plan: a close-up of water hitting grounds (hook), hands placing the dripper on a mug (setup), a slow pour (product in use), steam rising over a finished cup (payoff). You read the plan and cut the third shot to tighten it to three. It generates a reference still of the dripper, you swap in your real product photo, and it animates each shot holding that exact dripper. The assembled cut runs long by a beat, so you trim the pour, and you are done — one brief, two small judgment calls, a finished ad.

Troubleshooting common output problems

When a result misses, the cause is usually upstream. Match the symptom to the fix.

When to switch to manual mode

The agent is right when you want a finished result from a brief. When you want to art-direct every frame, the same models are available to run yourself — comparing models by hand when you want to judge outputs, or wired into the node-based builder for a repeatable pipeline. Most people use both: the agent for speed and first drafts, manual mode for hero shots. Our breakdown of when to drive manually instead covers exactly where that line falls.

Common mistakes to avoid

• Over-specifying shots. Briefs that dictate every frame fight the agent's planning. Describe the video; let it sequence.
• Skipping the clarify step. Defaults are fine for drafts, not finals.
• Treating the first cut as final. The refine stage is where good becomes finished.
• Ignoring references. If consistency matters, give the agent a reference image instead of hoping it guesses right.