This is a podcast. –> 65bits
This is also a podcast. –> mrbrown show
This is still a podcast, although most people call it a videocast. –> Diggnation
But this is NOT A PODCAST –> The Noose Podcast
Further reading –> Wikipedia: Podcast
A podcast is a series of audio or video digital-media files which is distributed over the Internet by syndicated download, through Web feeds, to portable media players and personal computers. Though the same content may also be made available by direct download or streaming, a podcast is distinguished from other digital-media formats by its ability to be syndicated, subscribed to, and downloaded automatically when new content is added.