Yes! We are all thankful to @eric.kiser for taking the time to create it and keeping it up to date. It is a really useful resource.
I personally did those rarely. There are a few topics in which I did - Slap for example. Slap is a bit better explained in the youtube video compared to the course to be honest. But all things that came relatively easy to me I just did the workout and moved on with the course.
I already started doing the finger exercises (5 Levels of Bass Finger Exercise (Beginner to Advanced)) before starting the course but to be honest I am not very disciplined with it. I just sometimes throw it in my practice.
Overall I just recommend focusing on finishing the course. You can create a workout/practice schedule afterwards. If you have time to play try to progress in the course. You can always have a look at the youtube guide but I would not get hung up on trying to nail the things Josh talks about in his youtube videos. Some of them are also more of a long term practice thing to make you gradually better. Not to “learn it” and then nail it.