Hello everyone! So I will try to make it short. Multiple Vizio Smart TV setup with an 8X8 HDMI Matrix and Yamaha receiver. Two DirecTV boxes, Apple TV, etc as inputs. All CAT6 cable running to TVs then have HDMI converters (transmitter / receiver) for each TV. When I use my Apple TV, I can play audio/video for YouTube and the Yamaha is using the correct AirPlay input… TV is using temporary audio output perfectly….. when I change to any other app (Prime Video, NFL, FoxSports, Paramount, etc.) I get video and no sound. Still on Airplay output for sound… but I don’t get anything for sound……only on YouTube. Any ideas?