This YouTube video tutorial, titled "Class 16 | Hydraulic Calculations for Sprinkler Systems," focuses on understanding hydraulic calculations for sprinkler systems using the area density method. The video demonstrates how to determine the total water demand and volume needed for various occupancy hazard classifications, considering factors like sprinkler system type, area, and density. The instructor outlines a six-step process, explaining how to calculate the water demand based on area density curves, and adjust these calculations for specific scenarios like quick response sprinklers or sloped ceilings.