Press bluetooth button, open camera and start recording video - How?

[Zaphida]

Is there anyway to set up a phone so you can press a button on a bluetooth remote and trigger the phone to open the camera and immediately start recording video?
Because there is a significant delay between seeing an event unfold that you want to capture and taking your phone out of your pocket, unlocking the screen, opening the camera, switching to video mode and pressing record. It would be very useful to be able to press a button which could be clipped to your waist or worn on a lanyard, whip your phone out and just point it at the action. You would catch a few more seconds of the start.

 

[Mr Bojangles1]

Depending on the phone you have there might be an option to open camera via hardware buttons. Like a double press on the power button or something similar. Open settings and type something like "quick" or "quick camera" into the settings search bar. Not sure about opening video and start recording automatically, might be be possible.

 

[Zaphida]

I'm firm on that last part.