I connected PWM output 5 on a Kiss FC to the PWM input on the VTX, and set up one of the potmeters wheels on my taranis to control it. Unfortunately I could only get it to change between channel 3, 4 and 5. I am also not sure if I think it is the best idea to have that ability because if you change it by mistake while flying, you will obviously loose your video and could also disturb other pilots video feed.