Good morning , I have a panny p50gt30 and am trying to play videos off a usb stick . FYI the files on the usb stick are the same on a sd card and the sd card plays the videos no problems , the same files and file format are then copied to a usb stick and when I try to play them , I get the error no valid file to play appear on the screen . But, even more odd- it does sometimes play these videos . I select the green viera tools button, select video . And this is the same way I always do it. Can anybody point me the right way in what I'm doing wrong or why it sometimes plays and others not ??