Where can I find advanced Unity tutorials?

Are there advanced Unity tutorials out there which cover coding on a higher level than just “scripting”? I’d like to learn about advanced delegate/event systems combined with popular game design patterns like the mutuator/facade/flyweight/factory/decorator etc…

Most of the tutorials on the internet are beginner tutorials which cover “how to write spaghetti”. I’d like to take it to the next level. So, are there tutorial series available for me to learn advanced Unity development?