One Church Software provides a feed URL for use with third party podcast services such as iTunes. Whenever you upload a new sermon, the podcast feed is automatically updated and therefore will appear on the external service. Refer to their documentation for details on how to connect the two systems together.
To see your podcast feed, navigate to the sermon listing screen and click on the arrow next to the "Add New" button at the top. Next, click on "View Podcast Feed."
A new tab will open showing the podcast feed. The URL in the browser is what you would give to the third party podcast service. The format of the URL is