You can make all of your content unavailable to some global regions, if you choose. You might wish to do this if you want your content made unavailable in your home state or country, for personal privacy reasons. You can also block individual videos from being viewed on the content page.
In the left sidebar menu, go to your Settings and scroll to the bottom where it says 'Region Blocking'.
Enter the countries or US states you wish to block.
Click 'save' when you're done.