The switches have limited qos capabilities, however, if you desire to connect the video server to the switch, you will need to upgrade the current code on the switch to support qos per the below link. Also, on the XL ports trust COS by default, if the Video server is connected to an access port (no cos present), then you will need to also configure the ''switchport priority default 4' to assign COS 4 to the video traffic.
http://www.cisco.com/warp/public/473/139.html#q2