Once you watched videos related to previous topics from Web development course. then you can start learning from HTML forms, graphics, media and apis.
You can skip or just view the topics given inside HTML graphics and apis, and html plugins because it requires js knowledge so we can cover this once we complete JS part. Now just try to cover remaining topics like you can learn about forms how to create it and use in in application. After that view all available media elements in html.
Try to understand these topics from reading or just watch videos related to it on youtube and finish this topics so after that we can start css part in css part we will use all our knowledge of html to create beautify designs with the help of css.
So, this is it for this post. once you complete these topics you can just view given examples and you can also give quiz and after that you can directly start CSS.