There are only a handful of questions tagged "copyright." And there's no tag wiki.
This questions was closed as off topic because it was about "legal." But since copyright is about the law, what constitutes an on-topic question about copyright?
I'm going to go with none. Copyright, as you said, is about the legalities of what you can produce, and sometimes even what you can shoot. That is distinctly not about the art and skill of video production. It is administrative and tangential. I would further extend this to other legal restrictions that affect the industry. For example, drones holding cameras are falling under interesting laws today, but, again, that is an administrative concern, not really about the art and skill of video production.