AI Video Detector: Is This Video AI-Generated?
Upload a 4–15 second clip. The detector samples frames across the whole clip, lays them out on time-labeled contact sheets, and has a vision model judge whether the footage looks AI-generated. You get a verdict and the reasoning behind it: which moments, and which visual cues, pushed it one way or the other.
What it is
A second opinion with the evidence attached.
An AI video detector looks at a clip and tells you whether it was likely made by an AI video generator rather than filmed with a camera. Most detectors answer with a single score and no explanation, which leaves you with nothing to check and nothing to show anyone else. This one works differently. It pulls frames from across your clip, arranges them on contact sheets with the time each frame was taken, and asks a vision model to study them the way a careful editor would: looking at hands, text, edges, lighting and how objects behave from one moment to the next. The verdict comes with reasons tied to those moments, so you can scrub to the same second in the original video and see the cue for yourself. Treat the result as an informed opinion backed by evidence, not a certificate. It is a fast way to decide whether a clip deserves more scrutiny before you share it, report it, or believe it. We build AI video tools ourselves, which is exactly why we know what these clips tend to get wrong.
How it works
Check a video in three steps
Upload the clip
Save or download the video, then upload a 4–15 second section. For a longer video, cut out the part that looks suspicious: a face close-up, hands, a sign, a moment where something moves oddly.
Let it sample and analyse
The detector pulls frames across the clip onto time-labeled contact sheets and a vision model reviews them together, looking for the visual traces that AI generation leaves behind.
Read the verdict and the reasons
See whether the clip looks AI-generated and why. Each reason points to a moment in the clip, so you can check it against the original yourself.
What the report shows
Not just a score: the frames and the reasons
A bare percentage is hard to act on. You cannot tell whether it reacted to a warped hand, a watermark, or just heavy compression, and you cannot show anyone else why you doubt the video. The report here has three parts. First, the verdict: whether the clip looks AI-generated. Second, the reasons: short, plain-language explanations of the cues that drove that verdict, such as lettering that changes shape or a background that shifts when nothing moved the camera. Third, the timing: each reason is tied to the time-labeled frames it came from, so you can go to that second in the original and look for yourself. If the reasons do not convince you, that is useful information too.
- A clear verdict, in words
- Reasons tied to specific moments in the clip
- Evidence you can check and show others
Do it by eye
How to tell if a video is AI-generated: 8 visual clues
Detectors help, but it is worth knowing what to look for yourself, because these are the same cues the report will point you to. None of them proves anything on its own; real footage can show one of these after heavy compression or a filter. Two or three together, though, are a strong signal. Pause, step frame by frame through the key moment, and look at the areas where generators most often slip. Faces are a common place to look, but hands, text and the background are often more revealing, because models spend less effort keeping them consistent.
- Hands and fingers that merge, multiply or bend wrongly
- Text and logos that wobble or change letters between frames
- Objects passing through each other, or physics that ignores weight
- Background details that drift, appear or vanish mid-shot
- Light and shadows that do not agree with each other
- Skin that is too smooth, or blinks that are missing or mechanical
- Edges of hair, glasses and jewelry that melt into the background
- People or objects that change subtly after being hidden for a moment
Popular generators
Check clips from Sora, Veo, Kling, Seedance and others
Most AI video you meet online today comes from a handful of well-known generators — Sora, Veo, Kling, Seedance, Wan, Hailuo, Runway and others. Each improves quickly, but they share weak spots: text, hands, fine repeated patterns, and keeping a scene consistent when something moves across it. The detector looks for these traces in general. It gives you a judgement about whether the clip looks AI-generated; it does not tell you which model made it, and no honest tool can do that reliably from a short clip. If you want to see how these clips are made, and why the traces look the way they do, you can try generating one in the LazyKiwi video generator or with Seedance.
- Looks for common AI traces, whichever tool made the clip
- Does not name or attribute a specific model
- Works on the picture only, frame by frame
Accuracy and limits
What can make the result wrong
No AI video detector is always right, and anyone quoting a precise success rate is quoting their own test set, not your clip. Several things make a judgement harder. Heavy compression from reposting smears away the fine detail where AI traces live. Beauty filters and stabilisation can make real footage look synthetic. Very short or static clips give fewer frames with anything to compare. Clips that mix real footage with AI-generated parts can go either way, depending on which part you upload. And the newest generators are, by design, getting better at hiding their traces. That is why the report shows its reasoning: you can weigh the cues it found rather than taking a verdict on trust. For anything with real consequences — news, legal matters, a reputation — use the result as a starting point and look for the original source, other angles and other reporting.
- Compression and re-uploads hide fine cues
- Filters can make real footage look generated
- An informed opinion, not proof or a certificate
Know the difference
AI-generated video vs deepfake
The two terms are often used interchangeably, but they describe different things. An AI-generated video is created from scratch by a model, usually from a text prompt or a single image: every pixel is synthetic. A deepfake typically starts from real footage and replaces or alters part of it, most often a face or a voice, so that a real clip appears to show someone saying or doing something they did not. This detector is built to judge whether the picture looks AI-generated. A deepfake that swaps only a face onto otherwise real footage may show fewer of the cues it looks for, and the detector does not analyse audio or lip-sync. If you suspect a face swap specifically, look closely at the jawline, hairline and teeth in the frames it flags, and check whether the same footage exists elsewhere without the change.
- AI-generated: the whole clip is synthetic
- Deepfake: real footage with part of it replaced
- Visual frames only; audio is not analysed
Why LazyKiwi
Why a report beats a percentage
Reasons you can read
Plain-language explanations of what looked wrong, not a number to take on trust.
Timestamps you can check
Every cue is tied to a moment in the clip, so you can verify it in the original.
Honest about limits
An opinion with evidence, never presented as proof, a certificate or a model attribution.
Made by people who generate video
We build AI video tools, so we know where generated clips tend to break.
Price before you run
Checks are paid in credits, and the workbench shows the cost before anything runs.
Short clips, focused checks
Upload the suspicious 4–15 seconds instead of a whole video, and get an answer about the part that matters.
FAQ
AI video detector questions
What is an AI video detector?+
It is a tool that examines a video and judges whether it was likely made by an AI video generator rather than filmed with a real camera. Good detectors also explain their judgement, because a verdict without reasons is hard to trust or act on.
How does LazyKiwi's AI video detector work?+
It samples frames from across your clip and arranges them on contact sheets labeled with the time of each frame. A vision model reviews the sheets together, looking for visual traces of AI generation, then returns a verdict with the reasons and the moments that drove it.
What does the detection report include?+
A verdict on whether the clip looks AI-generated, a set of reasons written in plain language, and the time-labeled frames those reasons refer to. That lets you go to the same second in the original video and check the cue yourself.
How long can the video be?+
Between 4 and 15 seconds. That keeps the check focused on the part of the video you are actually unsure about, and gives the model enough frames to compare across the clip.
My video is longer than 15 seconds — what should I do?+
Trim out the most suspicious 4–15 seconds and upload that. Good candidates are close-ups of faces and hands, any shot with readable text, and moments where something moves or behaves strangely. Most phones' built-in editors can trim a clip in a few taps. You can check several sections one at a time.
Can it tell if a video was made with Sora, Veo or Kling?+
It can tell you whether a clip made with tools like these looks AI-generated, by finding the kinds of traces they commonly leave. It does not tell you which of them was used.
Can it tell me exactly which AI model made the video?+
No. The detector judges whether a clip looks AI-generated; it does not attribute it to a specific model or company. Be wary of any tool that claims to name the model from a short clip with certainty.
How accurate is AI video detection?+
No detector is right every time, and we do not publish a success rate because any single number would depend on the clips it was measured on. Clean, uncompressed clips with visible people, hands or text give the clearest results. That is why the report shows its reasons: you can judge how strong the evidence is.
Can a real video be flagged as AI?+
Yes, it can happen. Heavy beauty filters, aggressive stabilisation, low light and heavy compression can all make real footage look synthetic. If a real clip is flagged, read the reasons: if they point to something a filter or compression would explain, weigh the verdict accordingly.
What should I do if a clip is flagged as AI-generated?+
Read the reasons first and check each one at its timestamp in the original. If the cues hold up, do not share the clip as real, and look for where it first appeared: the earliest upload, the account behind it, and whether any trusted outlet has footage of the same event from another angle. If you are reporting a scam or fake endorsement, the platform's own reporting tools are the place to start, and the reasons from the report help explain why you think it is synthetic.
Use cases
When to check a video
Breaking news clips
A dramatic clip is spreading faster than any outlet can confirm it. Check the key seconds before you share or cite it.
Scam and fake endorsement ads
A celebrity or doctor appears to recommend a product or an investment. These are among the most common uses of synthetic video.
Viral 'too good to be true' footage
Animals doing impossible things, perfect rescues, strange weather. The feed is full of AI clips made for views.
Brand and agency review
Check user-submitted or creator-supplied footage before it goes into a campaign that promises real customers or real results.
Classrooms and media literacy
Show students not only the verdict but the frames and reasons, so they learn what to look for themselves.
Your own peace of mind
A friend or relative sent something that does not sit right. A quick check is easier than an argument.
More answers
More on spotting AI video
Does compression or re-uploading from TikTok affect the result?+
Yes. Every repost compresses the video again, and compression wipes out the fine detail — texture, edges, small text — where many AI traces show up. Upload the best copy you can find, ideally the original post rather than a screen recording of it. Note that sharpening a clip with a tool such as unblur video adds detail that was not in the original, so it is not a way to make a check more reliable.
Is an AI-generated video the same as a deepfake?+
Not quite. An AI-generated video is synthetic from start to finish. A deepfake usually takes real footage and replaces part of it, most often a face. This tool judges whether the picture looks AI-generated; a face swap on otherwise real footage may show fewer of the cues it looks for.
How can I tell if a video is AI without a tool?+
Pause and step through the clip frame by frame. Watch the hands, any text or logos, the edges of hair and glasses, the background, and how objects move and collide. Look for details that change when nothing should change them. Then search for the original source and other angles of the same event.
Can I paste a YouTube or TikTok link?+
No, the detector works on uploaded files only. Save or download the video you want to check, trim it to 4–15 seconds, and upload the file.
Does it analyse audio or lip-sync?+
No. The detector looks at the picture only, frame by frame. A cloned voice over real footage will not be picked up, so for suspicious audio you need to look for the original source or other reporting.
How many credits does a detection cost?+
Each check is paid in credits, and the workbench shows the exact price before you run it, so you see the cost first. The pricing page explains what each LazyKiwi plan includes.
Can I use the result as proof?+
No. The report is an informed opinion with visible evidence, useful for deciding whether to trust or share a clip. It is not a forensic certificate or legal evidence. For anything with real consequences, combine it with source checking and, where needed, a professional review.
Is my uploaded video stored or shared?+
Your clip is uploaded to LazyKiwi's servers so it can be analysed. For details on how uploaded files are stored and handled, see the LazyKiwi privacy policy.
Not sure about a clip? Check the frames.
Upload 4–15 seconds and get a verdict with reasons and time-labeled evidence you can verify yourself.
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