UTM: Unified Threat Management The FortiGate unit has a series of built-in security controls that allow you to prevent access to specific types of content on the web. Using these FortiGuard Categories, you can prevent users from accessing streaming media content. Streaming media, whether it be radio, video, or live streaming, uses large amounts of bandwidth spread out over time, which can mask the true impact on available bandwidth. It can consume bandwidth continuously if left running in the background, even if paused or stopped. And having access to streaming media can interfere with productivity.
The original article/video can be found at Web Filtering: Blocking Streaming Content