It's good because there are many examples that will help you in practice. I think it's worth taking the lecture just to be able to see good sources that will be praised by clients and their explanations. However, in the explanation part, it's a shame that there's no explanation on how and why it's implemented this way. If you don't understand the principle exactly, it seems difficult to apply it to other projects. It's also a shame that all the scripts are implemented with jQuery. If you paid a little more attention to the names of the variables and set them, it would be easier to understand from a learning perspective.