I enjoy the NASAcast video podcast — each episode is a couple of minutes long, maxing out at less than 5 minutes, so was interested to read about a new podcast:
NASA has launched a new video podcast, NASA EDGE, that provides an offbeat, funny and informative look in and around the nation’s aerospace program. Whether it is the latest launch, the coolest gadgets, or developments in science and technology, the hosts of NASA EDGE give an unscripted and unpredictable perspective.
It sounds fun, so I’ve subscribed in iTunes and downloaded the first 4 episodes, though I haven’t yet watched any. Episodes are about 30 minutes long (approx 190Mb). Search iTunes to find the feed or check the NASA Edge web page.