I’ve seen Freek give his talk on Event Sourcing in Laravel at a Full Stack Ghent meetup recently. Glad to see the talk evolved a bit more and he now has made a recording of it.
Don’t let the “in Laravel” part scare you, as the knowledge is applicable across different frameworks and languages. For Laravel based projects you use Spatie’s own Laravel Event Projector package, but for others you can go with EventSauce.
More links – including source code! – in Freek’s post.