Why are some titles not showing in HD?
The majority of programming on HBO GO is available in High Definition. Standard Definition (SD) content is up-converted to the HD format in order to provide the best video experience possible. The "HD" logo or text appears on shows and movies that have the highest quality stream available.
HD is automatically provided if your device and current connection speed support HD-quality video. HBO GO automatically adjusts the video quality based on the strength of your network connection. If you're not getting HD quality video for an HD show or movie, try troubleshooting your connection (to do this, go to the Troubleshooting page and choose your device).