i don't get why they do that, shouldn't the video just be up right after it airs or at least the same time as the audio? no one is waiting a week to listen just for video.
They claim that it significantly affects the download numbers for the episode. Like it dropped 33% in downloads when they put the video up the same day as the audio.
They probably care more about the downloads from itunes and earwolf.com, because I'm pretty sure the videopodcast people pay them directly to participate. So they're getting the money both ways if they hold off on releasing the video a bit.