Student or Learner
What movie have you watched recently?
which movie have you watched recently?
Which one is correct?
Very often we can use them interchangeably, however we use which for questions when you have a limited range of possibilities.
In your first question, the answer could be any movie, since you're using what.
The second one would be better if you had given options: Which movie have you watched recently? x, y or z?
Not a teacher.