Here is a list of my favorite YouTube writing accounts.
First, Brandon Sanderson‘s has his college lecture series. My favorite is actually his guest lecture on short stories. It is super scalable to full novels.
Next, The Second Story by Hilary Layne. There are times when you listen to someone and you just know they understand the subject matter. Hilary is one of those people. Modern Writers Can’t Write was my introduction to her and it should be yours as well.