All of the videos I have downloaded into iTunes are still there but only the audio plays now. The Quicktime player is not called to view the video. This is true in all three of my accounts:
JapanesePod101
GermanPod101
and
ChineseClass101
I can open Quicktime outside of iTunes and search for the video in my home folder and play it there. Very inconvenient. I will be calling Apple this afternoon. If you know what is wrong, I would appreciate an replay. Thanks.