Iwan Hoogendoorn over at vcix-nv.com as created a VCIX-NV Video Study Guide completely available for free!
"Hi all! I created this website for myself and for others to use as a resource for the VCIX-NV exam. All the content will be freely available, and if you like this please re-share website so that others can benefit from it. Enjoy your studies!"
It is based on the VCIX-NV Exam Blueprint Guide v1.7 and v1.9 and contains lots and lots of free YouTube videos.