Xbox 360 error code 69-8000FFFF is an error that usually occurs when you pause and try to resume video playback. It could mean that the file format is not supported by Xbox 360 so it doesn't play the video.
1. Restart the Video
"Xbox 360 error code 69-8000FFFF" appears when a video format is not supported by Xbox 360 to do a playback. Also appears when the disc is protected by Digital Rights Management. Do try to replay the video from the start rather than resuming the video.