How can I adjust video playback volume when connected to an external display via HDMI? You can adjust the volume using the TV's remote control. Related articles Does the YI Dome Camera 1080p support Two-way Talk? What type of display modes are supported via HDMI display? What types of HDMI cable does the camera support? Is playing 4K videos via HDMI supported? How to set exposure settings such as aperture, shutter speed and EV?