I just got the hola for chrome. First the races were blocked, then with hola, it's not.
Someone posted these instructions:
Once installed, an icon appears on the chrome's menu/address toolbar. On mine it is right next to the three dashes that you use to get the drop-down menu. The icon is rather funny -- a little smiling head on fire.
In any event, once you get to AC's youtube page and get the notice that the race is not available in you country, click on the flaming head. A window should appear indicating that you are viewing the website from the United States (has a little flag icon). There is a drop-down menu to choose another country. There are probably 20 to choose from. I chose the UK. Hola unblocker then works its magic to make it look like you are watching from the UK which for me worked swimmingly.