Reverse image search tools
Google Lens (free): the default for general images, products, plants, landmarks, OCR. Deliberately suppresses face recognition.
TinEye (free): specialist for finding the original or earliest copy of an image. Excellent for copyright work and viral-image provenance.
Bing Visual Search (free): often surfaces matches Google misses, especially screenshots and infographics.
Yandex Images (free): strongest non-Western index — useful for images that originate outside Google's crawl.
PimEyes (paid): serious face search on the open web.
FaceCheck.ID (paid): cheaper face search with broader (less curated) index.
FootprintIQ Face Search (paid): face and avatar search across social profile pictures, returning a confidence-scored identity cluster instead of a wall of thumbnails.
Reverse video search tools
Google Lens on a paused frame: the simplest workflow. Pause the video, screenshot the most distinctive frame, run Google Lens. Works surprisingly often.
Yandex Images on a screenshot: same approach, often better for non-English content.
YouTube Content ID: only available to rights holders, but it's the gold standard for finding re-uploads of a specific video on YouTube.
Honest gap: there is no public consumer tool that takes a full video file and finds other appearances of that video across the open web. The frame-screenshot workflow is what you have.
Combining tools when one isn't enough
For images that matter: Google Lens + TinEye, or PimEyes + FaceCheck.ID + FootprintIQ for face work. Different indexes find different matches.
For video clips: screenshot three distinctive frames (start, middle, end) and run image search on each. Better recall than a single frame.
For social profile pictures specifically: FootprintIQ Face Search is built for this; PimEyes and FaceCheck cover broader web faces.