Videos and Books are Orthogonal. You switch as needed to reinforce understanding. That said, i always start with a book since they tend to be comprehensive and

Videos and Books are Orthogonal. You switch as needed to reinforce understanding. That said, i always start with a book since they tend to be comprehensive and allow me to study at my own pace. They force me to imagine and think which i don't get from any video (which is spoon-feeding at the author's pace).