There are several talks by the author:

https://www.youtube.com/watch?v=gG6DGmYKk4I

https://www.youtube.com/watch?v=jnDchr5eabI

https://www.youtube.com/watch?v=ArcypYS5XBQ

https://www.youtube.com/watch?v=uODSwR2CIV4

He also maintains samples on GitHub:

https://github.com/oskardudycz/EventSourcing.NetCore

https://github.com/oskardudycz/EventSourcing.NodeJS

https://github.com/oskardudycz/EventSourcing.JVM