Why your Roku might be plugged into the wrong HDMI port

Roku devices may not deliver their best picture or sound when connected to the wrong HDMI port or cable, Engadget reports. Most modern TVs support HDMI 2.0, which can handle features such as 4K, HDR10+, Dolby Atmos and Dolby Vision. Roku streamers, including the Ultra, are capped at 60Hz, so a 120Hz port is generally more relevant to gaming than streaming video.