In April 2015, The YouTube Data API (v2) was discontinued. As a result, starting with SGOS 184.108.40.206, in order to use Blue Coat categories for YouTube API (v3), you must specify a valid Server Key on the Proxy. After an upgrade to SGOS 220.127.116.11 or later versions, you also need to set the server key and enable YouTube as a provider. To obtain a server key, log in to the Google Developers Console, create a project and generate the key.
Note: You require a Google account to access the Google Developers Console. If you do not have an account, you can sign up for one for free at https://accounts.google.com/SignUp.
Alternatively, log in to the command line interface (CLI), enter configuration mode, and issue the following CLI commands to set the server key: