This is the sixth set of episodes in the Super Maker Bros. series by the Beard Bros. It is also the second type of episodes that does not have a theme. These episodes feature the new "Event Courses" and the courses made by "Nintendo celebrities like Undodog and Mary O." (as described by Alex).
You can find these tight videos covering Super Mario Maker at:
(eventually each episode's article will show every one of Jirard's creative comments that he draws during each episode)