You can often borrow the DVD or Blu-ray for free from your local library. Interstellar: Quick Movie Facts Director: Christopher Nolan.
Check your local library. Many libraries offer Blu-ray rentals of Interstellar free of charge. Or use services like Kanopy if your university subscribes. Interstellar Vegamovies
Despite the ease of Vegamovies, Interstellar continues to gross millions in re-releases. IMAX theaters frequently sell out anniversary screenings. This proves that true cinephiles crave the theatrical or legitimate home experience. You can often borrow the DVD or Blu-ray