Verify YouTube Claims — Check Any Video Against Real Sources

That YouTube video has 10 million views. Is any of it true?

Paste a YouTube link and Lenz extracts the key factual claims from the video, then lets you pick which ones to verify against real sources — so you don’t have to take the creator’s word for it.

Check a YouTube video now

Why YouTube claims need verification

YouTube is where millions learn about health, science, politics, and history. But unlike published articles, videos rarely cite sources — and the algorithm rewards engagement, not accuracy.

No editorial oversight — Anyone can upload, and there’s no verification before a video goes viral
Confident delivery sells — Creators who sound certain get more views, whether they’re right or not
Claims are buried in speech — You can’t ctrl+F a video, so bad claims slip past unnoticed
The algorithm amplifies engagement — Sensational claims get recommended more, regardless of accuracy

Watching a 20-minute video doesn’t mean you absorbed 20 minutes of truth. Lenz extracts the claims and checks them for you.

How it works

Paste the YouTube URL — Copy the link to any video and paste it into Lenz
Claims are extracted — Lenz processes the video and identifies the key factual assertions
Get sourced verdicts — Each claim is researched against trusted sources and scored for truthfulness

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What people verify on YouTube

Health & science

Wellness creators making bold claims about supplements, diets, and cures — backed by “studies” you can’t find.

Health claims →

News & politics

Political commentators and news channels making claims about policies, statistics, and events.

Political claims →

Education & explainers

Popular explainer channels that simplify complex topics — sometimes oversimplifying into inaccuracy.

For students →

Claims you might hear in a video

Intermittent fasting reverses aging
The moon landing footage was staged
Cold showers boost testosterone by 500%
Sugar is more addictive than cocaine
Finland has no homework
Napoleon was short

Heard something like this? Paste the video link and find out.

Why Lenz beats manual verification

You don’t need to watch the whole video. Lenz listens so you don’t have to, and surfaces the claims that matter.
No more Googling individual claims. Every assertion is checked against multiple real sources automatically.
Transparent sourcing. Every verdict comes with links to the evidence — so you can verify the verification.
Multiple AI models debate the evidence. Not a single model’s opinion — a structured pipeline where models research, challenge, and cross-examine before delivering a verdict.

Check a YouTube Video

Frequently asked questions

What types of YouTube videos can Lenz verify?

It works with the vast majority of YouTube content — podcasts, news commentary, educational videos, documentaries, interviews, and more. The only exception is videos where the creator has explicitly disabled captions and transcription, which is relatively rare. If that happens, you can paste the claim directly instead.

How long of a video can Lenz handle?

Lenz processes transcripts up to roughly 30 minutes of speech. For longer videos, it analyzes the first portion. You can also paste a specific claim from any part of the video directly.

Is Lenz free?

You get 10 free claim verifications per month — no credit card required. Need more? Subscriptions unlock additional verifications.

Does it work with non-English videos?

Lenz can extract transcripts in many languages and will attempt to verify claims regardless of language.

10 million views doesn’t mean it’s true.

Paste the video link. Lenz extracts the claims and checks them against real sources — so you don’t have to take their word for it.

Check a YouTube video now