How to add links inside a YouTube video?

Hi, I need to add links to the bottom of an YouTube video, like this Ben Stiller video here: http://www.youtube.com/watch?v=uDN08JwNEfc

Here is a video of a guy teaching how to add little baloons to an YouTube video: http://www.youtube.com/watch?v=u5otjHuOkVM. But he also says you cannot link outside of YouTube. The links created with this tool can only lead users to other YouTube videos.

Question: how can I add functionality similar to Ben Stiller's videos with links that lead users outside YouTube to something like a donation website?

From web app Marcos Buarque

• You might be able to get similar functionality using annotations;

  http://www.google.com/support/youtube/bin/answer.py?hl=en&answer=92710

  Hope this helps.

  musicfreak : From the page you linked to: "linking is restricted to certain pages on youtube.com."
  From Whitingx

• it's to do with the type of video you describe it as - changing it to educational/tutorial for example will allow clickable links in the description

  From rutherford

• Linking to external websites, or a Call-to-Action overlay, through annotations is available to partners in the Nonprofit program as well as advertisers and partners with promoted videos.

  The Case Foundation show an example of this in a video, How to Use New YouTube Annotations for Nonprofit Partners.

  Apart from that, you can still edit the description field to include the link to your site.

  From Eight Days of Malaise