VUDU is free to add to your Roku® player. From the Roku® home screen, select "Channel Store".
Scroll to the "Movies & TV" category
Use the arrow buttons on your remote control to highlight the VUDU channel and select "OK".
Install and launch VUDU
Select "Add Channel". To immediately launch the channel, select "Go to channel." VUDU will
be available on your home screen upon adding the channel.
Set up your VUDU Account
Follow the onscreen instructions to activate and sign up for a new account. Once you complete account setup, you'll receive 10 free* pre-selected movies on us!
Go to the Channel Store
Scroll to the "Movies & TV" category 
Install and launch VUDU 
Set up your VUDU Account 