As long as you’ve created a Movie library, which it looks like you have, all you need to do is copy your Memories of Murder folder/media under Movies. You don’t have to add it as another movie library, which it kind of looks like you’re doing. Apologies if I’m mis-interpreting you pics.
Lol, yeah, I get the frustration, (shocker), I was once a noob myself, lol! I definitely went through a learning curve and I still learn still all the time. Don’t feel bad about that. Just be the sponge and absorb it.
I created a test folder in my own Movie folder and coped a test .mp4 into it and it matched right away.
Ok, just saw something, Directories need to be 755, not 644. That’s ok for files but not folders/directories