I have the latest DC installed, along with Presto for variable speed.
I've tried several video podcasts and every time I begin one, it either starts the audio with a blank screen, or it starts (video and audio running) and suddenly the frame freezes and the audio continues.
Has anyone else had this issue? I've tried both internal and external players and both act that way.
Can you try launching the video to the external player to see if it's a problem with the android video player.
In order to do that I think you're going to need to set the video player preference to external and then press on the item.
In the next release, you'll be able to launch the video to an external player by long-pressing to make this type of testing easier.