This video is about USBC power delivery protocol and how to write small library for stm32 to request desired power.

USB PD library for sinking power github.com/quasiengineer/stm32g4tinyusbpdsink
PD Decoder Lite V1.0.1 PC Program usbchargingblog.wordpress.com/2020/06/24/pddecoderlitev100pcprogram/

Chapters:
00:00 Intro
01:02 Power delivery layers
01:51 Power delivery simpliest flow for the sink
02:50 Schematic for USBC connector
03:33 Library to implement power delivery protocol
04:38 Source capabilities
05:17 Demonstration
06:35 Outro