"hangi" means "which"

it should be "which movie" i think

"Sen hangi filmi izliyorsun?" Translation: What movie are you watching?

&

Which film are you watching? - London English (present continuous)

Hangi - (adjective) What & which.

What - (pronoun) (determiner) & (adverb)

Which - (pronoun) & (determiner)

Which is more formal when a choice is required.