What the video check does
The browser picks up to 10 frames spaced across the whole clip and keeps each frame’s timestamp. Those frames go to a face-forensics service, and Google Gemini reviews the frames for repeated visual conflicts. If the face service fails, the Gemini review still runs. The check does not look at every frame, so a change that falls between samples can be missed.
What it does not do
- It does not name Sora, Veo, Kling, or any other generator.
- It does not decode SynthID. Google’s own Gemini tools are what read that watermark.
- It does not read a C2PA credential from the video file. The credential reader on this site is for images.
- A low-risk result does not prove the clip, the speaker, or the event is real.
Checks worth doing yourself
- Watermark. OpenAI’s Sora launch post (30 September 2025, still on their site on 29 October 2026) says every Sora video included a visible watermark and embedded C2PA metadata. The same page says the Sora product is no longer available as of 26 April 2026. A screen recording or a re-export can drop both marks. A missing mark does not mean the clip is real. Source: openai.com/index/launching-sora-responsibly.
- SynthID on Veo. Google DeepMind’s Veo page says videos made with Veo are marked with SynthID. This check does not read SynthID. Source: deepmind.google/models/veo.
- C2PA on Veo. Google Cloud’s Content Credentials documentation, read on 29 October 2026, lists Veo 3 and Veo 3.1 model ids among models whose images or videos are signed by Google LLC. Use a C2PA verifier on the original file. This video upload does not do that read. A credential says who signed a claim. It does not prove the depicted event happened. Source: Google Cloud content credentials.
- Physics, text, hands, and audio. Watch whether objects pass through each other, whether on-screen text stays stable, whether hands keep a plausible shape, and whether speech stays locked to the mouth. One odd frame is not proof. Repeated breaks are a reason to slow down. These are viewing habits, not a measured accuracy rate.
- Kling. Use the same viewing habits. This page does not state a Kling watermark or C2PA policy, because no Kling vendor page was checked for this update.
Upload the file on the video detector. The method and the limits of the image pixel model are on the accuracy page. That page is not a video accuracy test.