Great news! You can now watch the movie of your choice at a reduced resolution, which will in turn help preserve your bandwidth.
If your internet connection is slow, or if you'd like to make sure you don't spend too much of your bandwidth/internet download on watching movies, this is what you should do.
Go to your account page and you'll see the option "Streaming Quality" under "Settings".
Select the video quality you want from the drop down list.
That's all. Your next video will be forced to a lower quality. Enjoy your movie stutter and worry free.