WMV (*.wmv) files use Microsoft's ASF container format. These files can be played by Windows Media Player and other players.
Advanced Systems Format (formerly Advanced Streaming Format) is Microsoft's proprietary digital audio/digital video container format, especially meant for streaming media. ASF is part of the Windows Media framework.
ASF container-based media is usually streamed on the internet either through the MMS protocol, the RTSP protocol or the HTTP protocol.
How to download streaming wmv, asf, wma, wmd, wm and other windows media files through RTSP, MMS and HTTP Protocol
1.Click "Add" button 
and open "add URL to download" window
2.Input URL into "URL" editbox
3.Select "Windows Media Streaming" from "Streams" drop-down list.
4.Press "OK" button, HiDownload will add the URL to list and download it.
Note: HiDownload automatically checks the windows media streaming server and selects the usable protocol (HTTP/MMS/RTSP) to download streaming media. You can change the order from "Options" window.
