You must have SSL Middle-In-Man configured to block this kind of content.
video/x-ms-asf
application/vnd.ms.wms-hdr.asfv1
application/x-mms-framed
audio/x-pn-realaudio
.*mms.*
.*ms-hdr.*
.*x-fcs.*
.*x-ms-asf.*
video/flv
application/x-shockwave-flash
application/octet-stream
application/x-mplayer2
application/x-oleobject
application/x-pncmd
video/x-mpeg2a
video/x-ms-asf-plugin
video/x-ms-wm
video/x-ms-wmx
video/x-pn-realvideo
video/quicktime
video/x-msvideo
video/mpeg
video/mp4v-es
audio/mpeg
audio/x-scpls
10. Close all windows and click on the button Apply Rules
On this example, streaming will be blocked to everyone, but you can block it just to a specific network segment, user or group.