You can add any type of supported audio file (MP3, MP4, or any other format iTunes supports) or video file to a blog or podcast entry (using either the Blog or Podcast template) to create a podcast.
Select the entries page of a blog or podcast by clicking it in the sidebar on the left of the iWeb window.
In the Title list at the top, select the entry you want to add the audio or video file to, or click Add Entry to create a new blog entry or podcast episode.
If the Media Browser isn’t open, click the Show Media button in the toolbar at the bottom of the iWeb window, and then click the Audio or Movies button.
Drag the audio or video file from the Media Browser to the placeholder image on the entry.
You can also drag a file directly from the Finder.
Important:Before posting anything to your website, make sure you own the copyright and other rights to what you or others are posting, or that you obtained all necessary permissions.
Adding a podcast created in GarageBand
Allowing visitors to subscribe to an RSS feed of your blog or podcast
Note:If you drag an audio or video file to a location other than the media placeholder, it does not become a podcast. Users can still listen to or view the file if they click it, however.