Issue with esp prog JTAG debuuger

Reading is one other threads like

https://community.platformio.org/t/problem-with-esp-prog-with-espressif-esp32-devkit-must-be-missing-something/13023/2

I am not clear about how to connect the USB ports.

Most videos on Youtube do not connect the VCC form the prog board to the ESP board…
so I would need another USB cable to the board…? Or does it have to be an external power supply?