Reverse video search is a way to search the web using a video file as the query. Instead of typing words, you upload a clip, a few keyframes are sampled from inside your browser, and each frame is matched against publicly indexed web imagery. When a page contains the same or a very similar image, that page comes back as a result.
A reverse video search answers the questions people usually ask about an unfamiliar clip: where did this come from, has it been reposted, and which sites are using this footage right now. Because the matching runs on actual pixels rather than titles, hashtags or metadata, it still works when the video carries no caption or watermark at all.
The full reverse video search tool is right above this section — no account, no installation. Below, you will find what the results mean, how the matching works, and what a reverse video search can and cannot prove, so every result comes with the right expectations.