I'm upgrading the IOS to (12.0) on several 2924XL switches and need to throttle bandwidth to UDP ports for streaming video.  Anyone happen to know the best way (least overhead) to do something like this?  For example, I'd like a user to be able to run a speedtest and show that they are able to access 20Mbps downloads and uploads but when they attempt to stream from sites, the bandwidth is throttled so they don't monopolize the circuit.

Thanks!