Show HN: The text disappears when you screenshot it

This game disappears if you pause it: https://youtube.com/watch?v=Bg3RAI8uyVw

Seems trivial to diff multiple screenshots to identify what parts move. Or just use a compression algorithm to do the same.

Has anyone tried a long exposure to see if the motion smears into something discernible? Obviously harder to expose a bright screen without some ND since the shutter speed is the phone's main exposure control

same thing, but a game: https://brantagames.itch.io/motus

Firefox on Android seems to just be a static image, I can't see any text.

Another idea I had with this concept is to make an LLM-proof captcha. Maybe humans can detect the characters in the 'motion' itself, which could be unique to us?

- The captcha would be generated like this on a headless browser, and recorded as a video, which is then served to the user.

- We can make the background also move in random directions, to prevent just detecting which pixels are changing and drawing an outline.

- I tried also having the text itself move (bounce like the DVD logo). Somehow makes it even more readable.

I definitely know nothing about how LLMs interpret video, or optics, so please let me know if this is dumb.

This makes me feel motion-sick, which is kind of impressive because I'm normally not easily susceptible to that.

You can also break it by recording the screen, of course.

Fun side effect: staring at the letters for a bit makes the rest of the image move.

Ha cool! How’s it work?

Had a lot of fun trying to break this. Turns out you can screenshot real easily by zooming out. Maybe there are other ways but I stopped trying :)