Subscribing to a podcast in iTunes, subscribing to different tabs, locating episodes, retrieving older epidoses, automatically retrieving latest episodes.
Note: you must subscribe to each individual tab, or by default you will only be subscribed to the first tab. There may be some tabs you want to subscribe to and some you don't, so please check (for example, some lectures are in audio format on one tab and video on the other. You probably want to subscribe to one or the other).
After selecting the group, click subscribe
The latest podcast will be downloaded there, and all future episodes will be downloaded automatically as they are added.
Grey-out episodes have not been downloaded yet.
That's it! All new episdoes will now be added automatically. On iPods, these will sync to your podcast library, on older iPods or mp3 players audio podcasts will appear in the "Music" section and video podcasts will appear in the "Videos" section.