This very solid pouch will allow you to take pictures & video in a very discreet way.
Hidden in plain sight, nobody will pay attention, unless the "people who know".
The "stealth smartphone pouch" and the next to come "sport smartphone pouch" are very easy to build.
List of material;
One plastic pouch, for instance ID card holder, diy laminate pouch etc...
A metal clotheshanger
1 meter of thin nylon wire
1 eyeglass lanyard paracord (but you can make your own)
Step 1: Pouch
Find a pouch to fit your smartphone ( iPhone, Android or Blackberry)
Important; one side of the pouch needs to be clear, transparant, so you can see the screen.