Chapter 15 Unified Threat Management for FortiOS 5.0 : Web filter : YouTube Education Filter
  
YouTube Education Filter
YouTube for Schools is a way to access educational videos from inside a school network. This YouTube feature gives schools the ability to access a broad set of educational videos on the YouTube EDU channel and to select the specific videos that are accessible from within the school network.
Before using this feature you must create a google account for your school and sign up for YouTube for Schools. The Youtube Schools account provides a unique ID registration key. This ID becomes part of the filter that is used to access YouTube EDU’s educational videos in schools even if other YouTube content is blocked by the policy.
More details can be found by going to:
http://www.youtube.com/schools