Function
Opens the video the progress board's continue tile would open, read with
useCourseContinueTarget, and words it the same way (capability
continue-target). The course page's enroll action and the enrollment
welcome both render this component, which is what keeps their label and
destination equal.
It does not check enrollment — the caller decides when a learner has joined. A course without videos offers nothing to open, so it renders nothing.
The way into a course the learner has joined: Start course, Continue where you left off or Watch again.