Authors may be designated for assets within certain sections of Media Manager. Any time a Collection, Category, Group, or Distributor (where applicable by account) is added by a Media Manager user, that person will be designated as the author by default. To view the Author of an asset, choose the asset by tapping into it and navigate to the Author section. You will see the Author listed, such as in the below example:
If the user who is the author is removed from Media Manager, the author will be reflected as "unknown".