If you are not seeing videos in DataCamp courses and have an edX account, it is likely because the courses listed in edX are actually different from the ones in DataCamp.
If that is the case, you would have to log into your edX account and access the videos from there.
In the screenshots below, you can tell that the course with (Microsoft) in the title is the edX course.
edX version of Course:
DataCamp version of Course: