What is an AI-generated video? A plain-English guide

An AI-generated video is a clip made by a computer program instead of recorded by a camera. Someone types a description, or gives the tool a photo, and the program produces moving pictures, sometimes with sound, of a scene that never happened in front of any lens. Some are obvious fantasy. Others look exactly like phone footage, news clips or CCTV.

This guide explains how they're made, how they differ from deepfakes and edited videos, where you're likely to meet them, and why it matters.

How AI-generated videos are made

The tools behind them are called video generators or video models. They learn from very large collections of existing video and images, picking up how scenes usually look and move: how light falls, how people walk, how water splashes. They don't store and paste clips. They produce new frames that fit what they've learned.

Most of today's generators start from random visual noise and refine it, step by step, into frames that match the request. Because they learned from real footage, the result can look very much like it.

There are a few main ways to use them.

Text to video

You type a description, called a prompt, such as "an old man feeding pigeons in a rainy market at dawn, filmed on a phone". The tool generates a clip, usually a few seconds long. Longer videos are often several clips joined together.

Image to video

You give the tool a still image, such as a photo or an AI-made picture, and it animates it: the person blinks and smiles, the waves move, the camera drifts forward. This is how old family photos get "brought to life", and also how a single fake image becomes a convincing fake clip.

Video to video

The tool takes an existing video and changes it: a new style, a different background, a changed face or new lip movements to match different words. This is where AI generation overlaps with deepfakes.

With sound

Newer generators can produce sound along with the picture. Google announced Veo 3 in May 2025 with generated background noise, sound effects and dialogue, and OpenAI's Sora 2, released in September 2025, added synchronised dialogue and sound effects. A talking, noisy, lip-synced clip is no longer proof that something was filmed.

Tools you may have heard of

Many companies make video generators, and they change quickly. Names that come up often include OpenAI's Sora, Google's Veo, Kling, MiniMax's Hailuo, Runway, Luma, Pika, PixVerse, Alibaba's Wan, ByteDance's Seedance and Tencent's HunyuanVideo. Each has its own strengths and its own habits, which is why detectors are tested tool by tool.

Below is a frame from a clip of a beagle standing on a wooden deck in warm light, made with Runway Gen-3. Nothing in it was filmed: the dog, the deck and the light all came from the model. Our video model scored it 99% AI.

Video VerifierRunway Gen-3

Video is likely

AI-made

Test set · Oct 2026crackly-ai.comVideo model: 99% AI

Our Runway detection page shows how that tool's clips score across our tests.

AI-generated, deepfake or edited: what's the difference?

People use these words loosely. Here's a simple way to separate them.

• Fully AI-generated: the whole clip is made by a model. No camera recorded any of it.
• Deepfake: usually real footage where a person's face, voice or lip movements have been replaced or changed with AI to make them appear to do or say something they didn't. Our deepfake detector page explains more.
• Edited or out of context: real footage that's been cut, slowed down, cropped or given a false caption. No AI needed, and just as misleading.

A full report from our checker reflects this too: a Deep Scan shows whether a video looks like real footage, real footage with AI added, or fully AI-generated.

Where you'll meet them

• Short videos on Instagram, YouTube Shorts and Facebook, from cute animals to "incredible moments".
• WhatsApp forwards, where clips lose their captions and credits as they travel.
• Ads, sometimes using famous faces without permission.
• Fake news clips with realistic presenters, logos and "breaking" banners.
• Devotional and festival art, often shared openly as art.
• Scams, where a fake video or voice of a trusted person asks for money.

Why it matters

Not every AI video is a problem. Plenty are honest creative work, clearly labelled, and fun to watch. The harm comes when an AI clip is passed off as real: a fake disaster that causes panic, a fake speech that misleads voters, a fake endorsement that takes people's savings, or a fake video that damages someone's reputation.

In India, amended IT Rules that took effect in February 2026 require AI-generated content to be labelled. Our guide to India's 2026 AI labelling rules explains what they say. Labels help, but they get cropped, stripped or never added, so it's still worth knowing how to check.

How to tell if a video is AI-generated

Start with the source: who posted it, and did anyone else film the same event? Then look for the tells AI still struggles with, like hands, text, background people and cause and effect. Our guide to the 12 signs of AI video walks through them.

For anything that matters, use a checker that looks at what eyes can't see. Our AI-generated video detector combines our own video model, which follows how the picture moves over time, with a frame model, a voice model, visible watermark reading, Content Credentials and, for links, the post's caption and published fact-checks. A Quick Scan is free to try, needs no sign-up, and answers in under a minute for most videos.

Quick answers

Is an AI-generated video illegal?

Making AI video is a normal creative activity, and many companies sell tools for it. Using it to deceive, defame, harass or defraud people can break the law, and labelling rules apply in some places, including India. This isn't legal advice; for a specific situation, ask a lawyer.

Can AI make a video of a real person?

Yes. Tools can animate a photo of a real person or change their face and voice in existing footage. Doing that without consent can cause real harm.

Are all AI videos fake news?

No. Many are art, entertainment or advertising made openly. The problem is AI video presented as a real event.