Published on 2026-07-25
Is that viral video really showing what it claims?
The commonest trick in a viral video isn't a deepfake. It's real footage, sometimes years old, wearing a caption that lies.
The video is real, you can tell: the shakiness, the ambient noise, someone's thumb briefly covering the lens. The caption says it's happening right now, in a place you recognise. That combination, real footage plus a confident caption, convinces more people than any special effect ever could.
Which is the detail worth sitting with before you go looking for glitches: the commonest trick behind a viral video almost never involves synthetic trickery. It's old or genuine footage with a false story stapled to the top. A deepfake takes computing power, time and a specific target. Recycling a real clip and writing a new caption takes about thirty seconds.
A shark that keeps swimming through every storm
The clearest case running is a single fabricated shark image that has now outlived several hurricanes. It started from a genuine 2005 photograph, taken by an ocean photographer and published in Africa Geographic, showing a great white shark swimming behind a kayak off South Africa. In 2011, someone digitally placed that same shark into a flooded street and posted it as a highway in Puerto Rico during Hurricane Irene. The image resurfaced during Hurricane Sandy in 2012, was relabelled as Houston in 2015, relabelled again as North Myrtle Beach later that year, and came back once more during Hurricane Harvey in 2017, when a single post carrying it collected more than 36,000 likes and 28,000 retweets. Same fifteen-year-old shark, a new disaster attached every time.
Hoaxes like this recur so easily because a real disaster has already gathered everyone's attention on the same feed, primed to expect something dramatic. Nobody needs to build trust in a brand new story from nothing. The urgency is borrowed from an actual, ongoing event, and the image only needs to survive a five-second glance before the next post arrives and pulls attention along with it.
Grabbing the frame that matters
Checking a video works on the same logic as checking a still photo, once you turn it into stills. Screenshot a handful of frames, the opening shot, the moment the claim is supposedly happening, anything with a distinctive object or sign in it, and run each one through a reverse image search. Trainers who teach this to newsrooms describe it as unlocking the video's provenance: if the same clip circulated somewhere before, the search finds it, and any claim that it shows something happening today collapses on the spot. Once you know when and where a clip actually started, you usually know why it's being reused now, and that context tends to matter more than any single technical detail buried inside the frame itself.
The bar behind claims of currency is honestly quite low, because dates and locations rarely get checked before a share button gets pressed. Weather in the background, the angle of shadows, the leaves on the trees: all of it can hint at a season that doesn't match the claim, well before any software gets involved. And there's a question worth asking before any of that: did whatever this video claims to show actually happen at all, anywhere, ever? Sometimes the honest answer is that nobody except the original poster has said so.
Timestamps embedded in the file itself help less than you'd hope, since most platforms strip that data the moment a clip gets uploaded, and every re-share afterward carries even less of the original information than the last. That's exactly why the reverse search matters more than the file's own properties: it rebuilds a timeline from where the footage has surfaced before, rather than trusting anything the video claims about itself.
Separate the footage from the story riding on it
Once you've traced a clip to its earliest appearance, you're left with two entirely different questions, and it helps to keep them apart. Is the footage itself genuine, unedited, what it appears to be? And does today's caption describe what's actually in frame, or has someone bolted a new claim onto an old, real scene? A video can pass the first test and fail the second completely, which is exactly what happened to one very worn-out shark.
So the next time a clip lands with a caption screaming urgency, save the theatrics for last. Grab a frame, search it, and let the internet's memory do what your eyes alone can't: tell you if you're looking at today, or at a shark that's fifteen years into a very long tour.
Sources
- Verifying Online Information (First Draft) (firstdraftnews.org)
- There are no sharks swimming in the streets of Houston or anywhere else (PolitiFact) (politifact.com)