BonesOfTheMoonIngenious "Fish Doorbell" Helps Fish Migration In The Netherlands
Five-hundred thousand links and I couldn’t figure out which went to the webcam on the first try so I gave up. Great reporting.
To be fair, the site is not intended for the general audience, but to ESL language learners. It’s very niche, so I’ll blame OP instead.
They did mention their sources at the end, though, including visdeurbel.nl, the site in question. But it’s not a clickable link.