If you live outside the USA, many channels in the public channel store may not be available. Private Roku codes often lets you access channels in other countries simply by entering a code for a private channels by visiting: HTTPS://MY.ROKU.COM/ACCOUNT/ADD
You will first be required to log in into your Roku account before adding a private Roku code.
To find Roku channel codes, use these private channel codes lists:
1900+ A-Z Private Roku Codes
Popular Roku Channels which include codes and descriptions