PCAST - iTunes Podcast File is a file extension that was created by iTunes. Using this extension, you will be able to get information about links, titles, and even categories about different tracks. This extension allows many users to share recommended podcasts as well as favorites with many other people over the internet. There are a few instructions you can actually follow to create what you need to through a PCAST file. They are extremely easy to use, and there are many different sources online in which you can actually download the extension if you need to. If you want more information, you can easily go online. You will also be able to view PCAST files using XML formatting only since they are stored under this particular format.