Engineering & Megastructures - 116 free documentaries about skyscrapers & towers.
Start with World's Tallest Tower: Burj Khalifa - Dubai's Vertical City (53 min, Free Documentary), then How Liquid Dampers in Skyscrapers Work (19 min, Practical Engineering). All 116 documentaries here are free to watch from their makers' official uploads. To read deeper, the top-rated book on skyscrapers & towers is Skyscraper by Karl Sabbagh.