Not sure if you already figured out how to add Unblock Youku Plugin. Here is how:
1. Launch google chrome browser and type "chrome://extensions/" in address bar.
2. Go to the bottom of the web page and click on "Get more extensions".
3. Search for "unblock youku" (upper left) and you'll get a bunch of stuff listed.
4. Click "+ Free" on the right of "Unblock Youku" item and you're all set.
By the way, you could also add another plugin called "tab to the front" which is very convenient when you use "middle-click" of your mouse.
Good luck.