Uncle Bob's videos are the classics of the genre. They explain the craft, methods and reasons with absolute clarity. They are a great source of knowledge and motivation to become a cleaner coder. They are entertaining, perfect for the beginners but they also have enough ideas interesting for experienced programmers.
The next sessions are dedicated to Design Patterns. We meet on the 11th of March to see episode 31 (https://cleancoders.com/episode/clean-code-episode-31/show). "In this episode we're going to dive deep into the Observer pattern... The first thing we'll do is derive the pattern from first principles... Then, we'll turn to the larger pattern that the Observer fits into: Model View Controller... Finally, we'll invoke the Humble Object pattern for testing GUIs, and we'll derive the Model View Presenter pattern from MVC."
This time the meetup is hosted and sponsored by Austin Fraser GmbH (https://www.austinfraser.com/de/).