Trying to learn alongside a video would be pretty hard, you couldn't go over it at your own pace! If you're serious about learning a programming language like PHP the first thing you should tackle is the concepts. Once you have a grasp of the syntax you will begin to read PHP like normal English, and it makes everything 100 times easier to learn.
You wouldn't learn a foreign language by memorizing words someone says, you would need to understand the structure. It's the same with a programming language like PHP!