There are two tabs in the Airtime menu that deal with podcasting. The Podcasts feature allows you to add podcasts from external sources to your Airtime schedule. The tab labelled My Podcast enables you to take a track from your Airtime library and publish it as a podcast of your own, on your Radio Page. Your self-published podcasts can contain a maximum of one track.
You can read more about podcasts in our Blog article here: https://blog.sourcefabric.org/en/news/blog/3427/Broadcast-and-Podcast-in-one-place.htm
You will find more details about podcasting in this Help Desk: