Not so hard to solve the problem, if you find the right program for the job.
As some of the guys round here already suggested, a screen capture program will be more helpful for you to save Netflix streaming videos rather than a Netflix streaming video downloader or some other app that downloads videos off the web...
Netflix's video streams have protection on them and this makes most video downloaders useless to capture netflix streaming. Now on the other hand, a screen capture app does not mess with any of that protection and merely records Netflix streaming movies for you.
If you want, you can take a closer look at some Audials Tunebite piece of software. This one works, among other things, to capture and record Netflix streaming videos and movies to the hard disk for offline viewing plus it can also convert netflix movies to whatever format you need for your devices.
There' s some guide on how the app works to capture Netflix movies, should be more helpful than my going on and on about it:
Anyhow, this piece of software worked for me every time for the job, it's pretty fast an reliable and gets you good quality videos and movies.