Live From the Flight Deck shared a step-by-step visual guide to starting a Boeing 737 airplane. The video is made up of shots taken during a number of flights with dummy settings on all the controls, but it covers the basic process that appears much more complicated than simply turning a key.
Please note that this is a fictional flight filmed in different locations and at different times. No route nor instrument setting is real, it has been made for video purposes only.
The procedures used are standard Boeing SOP’s rather than any airline’s SOP’s.