You must press the Video icon on the CUE screen and then select your video source, ie. USB,DVD,SD. Then you must press the on/off button on the top left of the CUE screen to turn the video on for the rear ceiling mounted screen. If you have a platinum model, the headrest screens are completely independent of the CUE software and must be turned on manually with the on/off button on the headrest screen or using the remote which is completely different from the remote supplied for the overhead ceiling mounted screen. Hope this helps.
Thanks for the replies. Ours is premium and has 2 overhead screens. I can play movies on the cue, but the rear screens are totally dead....no lights, nothing. The on off in the cue turns green, but still dead in the back. Same with the remote on/off button. Checked the right dash fuse too.