The thirteenth video follows up the twelfth by adding hierarchies to the dimensions created in the previous video. There is a discussion of why hierarchies should be created, then a demonstration of how to do it. Some properties are examined to change the name of the All level of the hierarchy, as well as to hide the All level. A best practice is examined, which is to hide any attributes that are used in a hierarchy. This video runs 25 minutes.
This video, along with all others, can be found on the Videos page of the site.