Translation:Are you interested in movies about birds?
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.
more than ONE movie (Plural) - so you use "interesan".... you say "te interesa esta pelicula sobre pajaros" if you mean a (one) movie you are watching right now or a special one
I said "on" also which is technically sobre so i am confused. Probably going to flag.
The english translation "Do movies about birds interest you?" also works. Maybe it should switch to that to save confusion.