Identify AC Problem and Initial Diagnosis

What happens here

The video begins with the presenter explaining that his central AC unit is not cooling, although the fan is blowing. He notes that the compressor inside the unit is not working, and the refrigerant lines are not getting hot, indicating a potential issue with the capacitor. He recounts his experience of learning how to test and replace the capacitor after consulting an HVAC technician friend due to issues with warranty claims and high technician call-out fees for a simple part replacement.