Here is another example on how to auto-fill your WordPress tube with the YouTube clips using YouTube RSS feed:
http://www.cyberseo.net/wordpress-tube/
This is example of such an auto-updating WordPress tube site:
http://www.hcshemaletube.com/ which is powered by sponsored content only (no stolen shit). For mainstream you can do the same using YouTube RSS feed or tube clips form any other video hosting which allows to embed its content into your site.
More examples will be added soon.
Have a nice day!