Launch Keynote 08 from the dock.
Open the slideshow that you would like to send to YouTube.
Select File : Send To : YouTube... from the menu.
If you don't have a YouTube account already setup then click Add.
Choose the Category from the pop-up menu and fill out the "Title" and "Description" fields. In the Tags field, you can type keywords to help people find your movie if they search for it on the YouTube website.
If you don’t want your movie to be seen by anyone but you or by viewers on lists you've created, select "Private video."
Click Next and then click Publish to accept the terms of service offered by YouTube.
In the dialog that appears, click "Go To Website" to visit your movie on the YouTube website.