flyguille posted in the openMSX forum:
"when I was recording in video the demostration of some soft for youtube. The emulator records what the MSX screen shows, but sometimes for the demostration I wanted to show in realtime on the video what keys I pressed for the MSX react that way!.
Now in wich part of the MSX screen to overlay or in wich way to show the multiple inputs at the same time or when is a burst, how long, it they will move out for dissapearing, that is another thing.
It must be switache ON & OFF easy as using a NON-MSX keys for that because when recording one wants to show what is pressed only on specific things and not all the video. "
So, in summary: for demo videos it could be useful to show on screen which keys/inputs are pressed, to explain how to operate a certain MSX software. And for YouTube purposes, this would then have to be recordable of course... (which is actually a separate feature request: record not only the MSX pixels, but also OSD pixels...)