Access Rooftop via Internal Ladder and Hatch

What happens here

A crew member proceeds to gain access to the building's roof through an internal route. The camera follows his ascent up a sturdy, snow-dusted metal ladder located within a dimly lit section of the building. Upon reaching the top, he carefully pushes open a metal roof hatch, revealing the snow-covered expanse of the rooftop and the overcast sky above.

Goal: Safely reach the rooftop to retrieve the drone.