① DINOSAUR Dinosaur DVD ② E.T. DVD Set of two Playback has been randomly checked. I confirmed that there were no problems by playing them through when I purchased them, but the check just before listing is only random playback. We are very sorry, but we do not accept returns even if there are any sound skips or video interruptions. Also, we do not know if they can be played on all playback devices. We apologize for the inconvenience.