"¿Te interesan las películas sobre pájaros?"
Translation:Are you interested in movies about birds?
The english translation "Do movies about birds interest you?" also works. Maybe it should switch to that to save confusion.
Interesan means "they interest", so "te interesan" means "they interest you".
In inglés you say that you are interested in something, while in Spanish you say that something interests you. It's just the opposite way of saying it.