I live in the Netherlands and people all over started doing it! I think it's a 'see and do' kind of thing. Maybe start one of your own? My mother once did and she had to move books into her home cause it was constantly full!

A lot of the little libraries around my area are penguin introduced. IIRC, they have a scheme where you can contact them and apply for your own local little library. Though I imagine it's something you could also just DIY if you're super interested! Highly recc, they're always full when I walk past!

If it makes you feel better, I've never been into a real library

I have been thinking about making my own since watching those videos, unfortunately I don't live in an area that gets very much into reading so I don't know if it would be very popular...I guess I'd have to try it to find out x)