Hello John,
if the technology interests you then it’s fun just to learn on your own, not having to worry about exams.
About the course format, it depends. When I started Networklessons, I only wrote articles and sometimes recorded videos. Nowadays, I add a video whenever I write something. So for now, you won’t find a video for each lesson…hopefully in the future I can change this and add a video for each and every lesson.
Rene