"Video In" Just When I play Midi keyboard

So my idea is to have a Camera pointing to the keyboard with opacity set to 0% (OFF) so when I play on the keyboard the opacity of the camera would go to 100%(ON) and it would be way more cooler if the opacity after 5sec of no interaction with the keyboard it would go back to OFF

so if I keep playing the camera would show me playing and when I stop playing 5sec after the video would just vanish from the screen

i haven’t tried this but if you put an envelope follower on the video channel (esampler channel) and map it to the volume on the mixer’s slider and mess around with envelope to get desired results.

this should do that or it should be a good place to start