How to Choose an AI Video Generator: Credits, Watermarks and Commercial Rights (What to Check)

By LuckyReviewer Editorial Team·October 20, 2026·4 min read

AI video generators can now turn a script into a talking-avatar video, animate a still photo, dub a clip into another language or generate a short scene from a text prompt. Most of them sell access through credits, and the cheapest plans often come with watermarks, low resolution or a license that does not cover business use. Two tools with similar headline prices can cost very different amounts once you add up what your projects actually need. This guide covers what to check before you pay.

Start with the job, not the tool

"AI video" covers several different products, and few tools are best at all of them:

Avatar or presenter videos: a digital person reads your script. Useful for training, onboarding, product explainers and internal updates.
Video translation and dubbing: your existing video is re-voiced in another language, sometimes with lip-sync.
Text-to-video and image-to-video: short generated clips for social posts, ads or concept work.
Face, head or clothing swap: replacing part of a person in existing footage.
Slides to video: turning a PowerPoint or PDF into a narrated video.

Write down the two or three jobs you will do most often, the typical video length, and how many videos a month you expect. That list is what you will compare plans against.

Understand how credits are counted

Most AI video tools charge in credits, and the conversion is rarely simple. Check:

Cost per task: is it per second, per minute, per image or per generation? Premium models often cost several times more than standard ones.
What a plan really buys: divide the monthly credits by the cost of your typical task. "600 credits" means little until you know it equals, say, 60 clips with one model or 150 with another.
Failed generations: are credits returned automatically if a job fails? A result you dislike is usually not treated as a failure.
Expiry and rollover: many plans expire unused credits at the end of each month. If your usage is irregular, a smaller plan plus occasional top-ups may cost less.
Top-ups and overages: what extra credits cost, whether they expire, and whether automatic overage billing is switched on by default.

Check watermarks, resolution and length limits

Free and entry plans are often limited in ways that matter only when you try to publish:

Watermarks: some free plans put a small logo in a corner; others cover the whole frame. Check which plan removes it.
Resolution: 720p may be fine for internal training but looks soft on a large screen. 1080p is a sensible minimum for public content; 4K usually sits on higher plans.
Maximum length and upload size: both for videos you generate and for footage you upload for translation or swapping.
Processing speed and concurrency: lower tiers can queue jobs, which matters on deadlines.
Storage: how long finished videos are kept, and whether you need to download them before they are deleted.

Read the license before you use output commercially

This is the step people skip. Before using AI video in ads, client work or anything you sell, check:

Plan license: some tools label lower plans "personal" and reserve business or commercial licenses for higher tiers.
Stock avatars and voices: these are often based on real actors and may carry extra limits, such as no use in paid social ads, TV, political or religious messages, or endorsements.
Model terms: tools that resell third-party video models may pass on those models' restrictions.
Ownership and copyright: many providers say you own your output but make no promise that it can be protected by copyright, and leave you responsible for any third-party rights in it.

If the pricing page and the terms of service seem to disagree, ask the company in writing and keep the reply.

Consent, likeness and disclosure

Any tool that swaps faces or clones voices can be misused, and the legal responsibility usually sits with you, not the platform. Reputable providers ban non-consensual and sexualized deepfakes, impersonation, and misleading political content. Good practice:

Use only your own face and voice, or those of people who have given clear, ideally written, permission for the specific use.
Get a signed release before using someone's likeness in marketing; many US states protect a person's right of publicity.
Never imitate real public figures in a way that could make viewers think they said or endorsed something.
Label AI-generated or altered video. Platforms such as YouTube, TikTok and Meta have their own disclosure rules for realistic synthetic content.

Privacy, billing and refunds

Uploading faces and voices means sharing what some laws treat as biometric data. Look for answers to these questions in the privacy policy:

Is your content used to train models, and can you opt out?
How long are uploads and generated videos kept, and can you delete them yourself?
Is there a separate biometric data notice explaining retention and deletion?
Which third parties process your files, and in which countries?

For an example of how one platform spells out credits, licenses, refunds and its consent rules, see our Akool review.

Billing deserves the same attention. AI subscriptions usually renew automatically, and refunds are often limited to a short window on the first purchase, sometimes only if you have not used paid credits. Before you buy, note the renewal date, how to cancel (in the dashboard or by email), whether workspace seats are billed per person, and whether yearly billing is refundable if the tool does not work out. Test on the free plan with your own real footage first.

A quick checklist

Your main use cases, typical video length and monthly volume written down
Credit cost of your typical task worked out for each plan
Credit expiry, rollover and top-up prices checked
Watermark removal, resolution and length limits on the plan you will buy
Commercial license confirmed for how you will use the videos
Stock avatar and voice restrictions read
Written consent for every face and voice you use
AI disclosure planned for published videos
Privacy policy checked for training, retention and deletion
Renewal date, cancellation steps and refund window noted