While I agree they are not enough to build a strong basis, they are a wonderful aid. I would advise following a more traditional path, with a good book, but I

While I agree they are not enough to build a strong basis, they are a wonderful aid. I would advise following a more traditional path, with a good book, but I cannot think of any good reason to not take a break from the book to watch some related 3B1b video from time to time.