Please see attachment for details
Videos are accessing form Instructor End
Okay are you using any third party plugin for embedding the videos in unit ?
If yes then please try deactivating the "Disable ajax in Course unit load" from lms -> settings .
Please note that in wplms units cannot be accessed from the curriculum .
It can only be accessed by the instrcutors and admins only .
What is the point of seelling course if user can access the unit from a link ?
a user can only access the units on course-status page when she is subscribed to course by clicking on the start/continue course button .