While listening to audio-only podcasts, iPhone owners can press the ‘Sleep/Wake’ button to turn off the display, yet still continue listening to the podcast. iPhone users can also click the iPhone’s ‘Start’ button when listening to audio podcasts, use other iPhone apps, and continue listening to the podcast uninterrupted.
Not so with podcasts. Pressing the ‘Sleep/Wake’ button, or clicking the iPhone’s start button shuts video podcasts off. The the inability to just listen to video podcasts has been one of my primary complaints with the iPhone’s iPod functionality.