I know this area well. I lived there for years or in the area since the early 1970's.
My Mother lived at 775 Post Street for 17 years. You can see the building in the far right at Post & Leavenworth at 3:41 in the video. 3 blocks left of that is the fire station. We constantly heard fire engines the entire time we lived there including when an arsonist set fire to the apartment next to ours in 1972 which gave my Mother her first heart attack and left me fighting the fire because I had been in the front of our apartment on the 6th floor doing homework for college & the smoke was too thick to see how to get out so I played a hose on the door of the burning apartment until firemen arrived.