I have found today that the Herelink telemetry relays video stream through QGC using the following HDMI configuration
hdmi_mode= 34 or 16 or 31
I also found out today that the " connection lost" speech stops while I set the HDMI mode to 31 …Else always when i start the video at HDMI mode 34 or 16 , it almost was synchronizing the speech " connection lost " !!
Radio Telem - Herelink
FC - Orange CUBE with Px4 firmware
Drone - Mini Talon
Parameter edit platform- QGC
serial baud - 115200 8N1