British armed forces training to fill in for ambulance workers who are due to go on strike

The video tutorial explains the use of a carry sheet for safely transporting patients by wrapping them like a burrito and moving them down staircases. It also introduces a belt, which is a lesser-used piece of equipment, not intended for lifting patients due to its buckle design.

What additional equipment is mentioned alongside the carry sheet?

Why is the belt considered a lesser-used piece of equipment?