Podcast (or... downloadable youtube?)

There are tons of sites for locating and downloading podcasts out there that I discovered. Some of the ones that I liked included podcastalley, podcast.com, and massively.com. All of which seemed to offer a variety of content to download. I've never been one for watching podcasts, though some of my friends are very avid watchers of some of them. So before now I was aware of them but didn't actually have any personal experience with them. Learning more everyday, geeez, will the journey never end?!;-)