Wii Transfer provides a convenient way to access your video podcasts. Choose File → Open Podcast to browse a list of podcasts already downloaded by iTunes. Select the podcast episode you wish to watch on your Wii, then click the Open button. The movie will automatically start converting for streaming to the Wii using the media sharing feature.
See Streaming Movies with Flash Video for details.
This feature requires video podcast subscriptions inside of iTunes. Wii Transfer itself does not directly subscribe or download to podcasts. If Wii Transfer reports that you do not have any video podcasts, launch iTunes and use the iTunes Music Store podcast directory to browse and subscribe to video podcasts. Once the episodes finish downloading in iTunes, they will be available for Wii Transfer to access.
Requires iTunes 6 or later. iTunes 7 or later is recommended.