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Great video. Just one comment: on 31:39 you mention a 4.7uF capacitor. The black body SMD capacitor is rather a Tantalum capacitor and KiCAD has a separate library for these. It looks like a Kemet A series (3216 or similar). Similarly, if it was an 0805 there are footprints for these as well and thus there is no need to select an SMD electrolytic footprint ;)
Interesting to note, there are Microcontrollers with integrated USB support. Even in the STM32F0 family, for example the STM32F070xx ones. that way you'd only have to hook up the USB_D+/USB_D- pins to the connector.