You could whizz through all the videos in an hour. But the idea is you watch the video where I present a problem, reflect where you are at, listen to my proposed solution, reflect upon that, and consider what you would need to change to make it work for you.
Therefore, a half-day is probably suitable to do the course.
Even better if you can do a section of the course, try some ideas in your classroom, reflect on what worked and what didn't, and then move on to the next section of the course.