The script goes in after the morning stand-up, and by lunch there is a cut with a voiceover, music, captions and an end card. AI ad creative tools have made that first draft cheap. Whether the draft can run as a client's paid ad is decided by things the render doesn't show: whose licence covers the voice and the music, whether the brand's mandatories survived, whether each placement's specs were met, and whether the client signed off the version that went live.
The takeaway: know what kind of tool you are looking at before you trial it, then put seven video-specific questions to each vendor and compare the written answers. An AI video creator for ads belongs in an agency's workflow when its terms, controls and limits hold up for client work, not when its demo looks good.
Step 0: Know what the tool is for before you test it
"AI video creator" is a label for several different kinds of product, and they suit different ad jobs:
- Script-to-video tools assemble a draft cut from a script, usually with stock footage, a synthetic voiceover and music.
- Template editors start from a fixed layout and let you swap in footage, text and brand assets.
- Animated explainer makers build drawn or animated scenes around a voiceover.
- Avatar presenters put a synthetic presenter on screen to read the script.
An agency that needs fast cut-downs of short video ads for social placements and one that needs a presenter-led explainer are not shopping for the same product, and a trial of the wrong kind wastes the brief you spend on it. A shortlist starts from what a tool is for.
Eric Salo Reviews publishes short, first-person reviews of online tools, software, courses and services, and its AI coverage includes AI video creators. A review there says what a tool is, what stands out and who it suits, with a link to the product. Reading an AI video tool review there before you ask for a demo tells you what that kind of creator does and who it is aimed at, so you can shortlist the kinds worth a trial before you run the checks below. Its AI coverage also takes in AI writing and content tools, AI chatbots and AI product-image tools, and an overview of the kinds it covers is on its AI tool reviews page.
Know the limits of that step. A review describes the kind of tool; licence, seat and client-use terms come from the vendor, so get those in writing (checks 1 and 7 below). Some of its links are affiliate links: it may earn a commission at no extra cost to you. Its Disclosure & Disclaimer page is linked in its footer.
Seven checks before you pick an AI video creator for ads
Whatever an AI video generator for ads shows in its demo, put each of these to the vendor as a question and ask for the answer in writing. They are written for video; a still-image tool raises a different, shorter list.
1. Voice, music and stock: do the licence terms cover a client's paid ads?
For every synthetic voice, music track and stock clip in the output, ask whether the vendor's licence terms cover paid ads run for a client, not only your own channels. Then ask whether those terms still apply to ads that are already running after you cancel the plan. Ask about each asset type separately: a vendor's voice terms, music terms and stock terms can sit in three different documents, and a gap in any one of them is enough to pull an ad.
2. Brand controls: will every cut keep the mandatories?
Look for a saved brand kit (fonts, colours, logo, end card) and reusable templates, so every cut keeps the mandatories set in the creative brief: the logo lock-up, the legal line, the offer wording, the end frame. Ask whether the kit is shared across every user on the account, and whether one person can lock it so a freelancer can't change the end card on a Friday afternoon.
3. Placement specs and captions: will each export fit its placement?
Aspect ratio, length, safe zones and caption rules differ by placement, and platforms update them. Don't take a tool's preset names on trust: export against each platform's own current spec page, then check the result inside the placement preview. Ask whether captions are burned into the video or exported as an editable file. A burned-in caption with a typo needs a new render; an editable one needs a text fix.
4. Scene-level edits: can you change one scene without starting again?
Can you swap the hook, replace an end card or re-record one voiceover line without regenerating the whole video? This decides how cheaply you can refresh creative when an ad tires, which is the usual remedy for ad fatigue. A tool that regenerates the full cut for every change can also hand back a slightly different video each time, and then the client is approving a new ad, not a corrected one.
5. Review and approval: does nothing go live before sign-off?
Ask for share links the client can open without a paid seat, comments pinned to a moment in the video, version history, and a record of which version the client approved. If the tool can push videos straight to ad accounts, ask whether that can be blocked until a named approver signs off. The approval trail is what you point to when a client asks why a version ran.
6. Ad labels: will the ad still read as an ad?
AI makes it cheap to produce ads styled like a creator's own post or an organic clip. They are still ads. UK advertising rules (rule 2.1 of the CAP Code, which the ASA applies) say marketing has to be obviously identifiable as marketing. So label AI-made ads as ads, use the ad or paid-partnership label a platform offers, and ask the vendor whether its templates leave room for an on-screen label that a placement's safe zone won't crop.
7. Seats and render limits: what does your plan allow?
Ask for the number of users per plan, the render or export allowance, the export resolution, and whether exports on your plan carry a watermark. Ask how client work is counted (per account, per brand or per seat) and what happens to projects and brand kits when a plan ends. A trial account may run on different limits from the plan you would buy, so ask; don't assume.
Run the trial on one real job
Run each shortlisted tool on one real brief, one set of placements and one approval round with the client's own brand kit. Then compare the vendors' written answers side by side. The most polished demo cut matters less than the vendor whose terms you can show the client.
The vendor question sheet
Copy this into the email you send each vendor. The third column is what a weak answer tends to sound like, so you know when to ask again.
| Check | Ask the vendor | A weak answer sounds like |
|---|---|---|
| 1. Voice, music, stock | Do your licence terms cover paid ads for a client, for voices, music and stock, and after we cancel? | "Commercial use is allowed," with nothing on clients, paid ads or cancellation |
| 2. Brand controls | Can we save a brand kit and templates, share them across users and lock them? | "You can upload your logo" |
| 3. Specs and captions | Which placements do your exports target, and are captions editable after export? | "We support all formats" |
| 4. Scene-level edits | Can we change one scene, end card or voice line without a full re-render? | "Edit the prompt and generate again" |
| 5. Review and approval | Do you offer client share links, timed comments, version history and a publish lock? | "Download the file and send it" |
| 6. Ad labels | Can templates carry an on-screen ad label inside each placement's safe zone? | "Users can add text" |
| 7. Seats and limits | How many users, renders and what resolution does our plan include, and is there a watermark? | "It depends on usage" |
Keep the replies with the project files. If a client later asks why a voice, a track or a version was used, the vendor's written answer is the record.
Frequently asked questions
Can AI video ads use synthetic voices?
The voice's licence terms with the vendor and the ad platform's own policy decide, so get both in writing before client use. If a voice imitates a real person, get that person's written consent first, whatever the tool allows.
Who owns the output?
The vendor's terms say what rights you get and whether you may use the output in a client's ads. Whether anyone holds copyright in AI output is a separate question, and the answer varies by country. In the US, the Copyright Office's Part 2 report on copyrightability (January 2025) concludes that, "given current generally available technology, prompts alone do not provide sufficient human control to make users of an AI system the authors of the output" (US Copyright Office). That is the US position only. Get the terms in writing, and don't promise a client exclusive rights to AI-made footage without legal advice.
Does a review tell me whether a tool suits client work?
Not on its own. A review on Eric Salo Reviews says what a tool is, what stands out and who it suits; licence, seat and client-use terms come from the vendor. Use the review to shortlist the kind of tool, then run the seven checks.
Is the product link in a review there an affiliate link?
Some can be: Eric Salo Reviews says some of its links are affiliate links, so it may earn a commission at no extra cost to you, and its Disclosure & Disclaimer page is linked in its footer.
What is the biggest risk of skipping these checks?
Running an ad whose voice, music or footage isn't covered for a client's paid use, or one that doesn't read as an ad. Both can force you to pull a live campaign and remake the creative. Checks 1 and 6 cover them, and both cost an email and a review step before launch.
Next step
Brands that want an agency to produce their video ads can find and compare agencies on AgencyList. Shortlist kinds of AI video creator at EricSaloReviews.click, then run the seven checks against each vendor's own terms before any client work.
Disclosure: Eric Salo Reviews worked with us on this piece; the checklist names no video product.
