Was not suggesting "lots of stuff" to look at, just great big idiot lights that come on after the chute release to confirm the chute pack opened and you have deceleration.
The rear view monitor would only be something to look at after all the other important items have been taken care of, just like the rear view mirrors.
You have one green idiot light come on when the chute pack opens, telling you that you got a release and the chute pack is open, and a second big red idiot light that only comes on when the green light is on, and no negative G's from a fully blossomed chute. That could be as simple as a ball bearing in an inclined tube that would slide forward under negative G's and close a contact.
Keep this sort of stuff cave man simple.
Larry