JSON action to set specific Zoom in video player?



I would like to map a command to a remote button so that while playing a video, I can push one button and it will change the video’s Zoom to, say, .74. This would make it easier to quickly scale non-scope videos to fit on a scope screen without having to use lens zoom/shift. Is this possible with JSON?

It looks like Player.Zoom does this maybe but cannot figure out the formatting?