All of my video content was purchased through the iTunes store, and played just fine on my old 30GB iPod with Video (purchased 2007). None of it will sync now to my iPod Touch (newest version as of 9/2011) or my iPad 2. I receive the "cannot be played on this device / video format not supported" error. I have tried removing the files from the library and re-adding them, to no success. Any suggestions?