Mike Senior’s books (“Recording Secrets for the Small Studio” + “Mixing Secrets for the Small Studio”) are great places to start for recording & mixing knowledge.
For music theory related production tips, I do like the Hook Theory ebooks/apps, they provide a decent and straight forward introduction to harmony (pop).
Then there are plenty of genre specific options, like Rick Snoman’s Dance Music Manual or Mark Levine’s Jazz Theory Book.
I find video courses on production always a bit difficult, as they often show someone using a tool or performing a particular trick/tip with a tool rather than really delivering the fundamentals. I also find it hard to go in depth with videos, as it all sounds easy and straight forward in demonstration (but actually is much more complex and interesting in application).