If you're looking to watch the movie "Arthur Christmas," you have a few options. You can rent or purchase it on various streaming platforms such as Amazon Prime Video, Netflix, or iTunes. Additionally, you can purchase a physical copy of the movie on DVD or Blu-ray from various retailers. The movie is also available on cable TV channels such as Cartoon Network and TNT. You can also look for it on your local library's digital streaming service, if they offer one. Finally, you can try to find a local screening of the movie at a movie theater that is showing it.