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.
Why YouTube videos need fact-checking
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 fact-checking 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
What people fact-check 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 fact-check →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 fact-checking
- 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.