When shooting the MIMA video, I needed a way to hold the camcorder so it would shoot the dash display,with no hands, as I needed both to drive the car.
I cut an oak board in a triangular shape with two soft rubber feet for the driver door side,and a square shape that fit into the steel square tube on the other. A locking screw was made by welding a nut over a clearance hole on the end of the square tube. It works just like a tripod leg. The telescoping arm is put between the two front doors and forced open so it presses against each, then lock it.
A tripod head was attached so the camera can look at the dash while driving.
The MIMA videos were shot using this technique.