As the docs indicate:
Gets the top clips for the games followed by a specified user, identified by an OAuth token.
So, depending upon the OAuth token you provide, which is tied to a user account, you will get the data for that user.
As the docs indicate:
Gets the top clips for the games followed by a specified user, identified by an OAuth token.
So, depending upon the OAuth token you provide, which is tied to a user account, you will get the data for that user.