There are many streaming video recorders that support Real video .RM streams broadcasted through the RTSP protocol.

I used to download video lectures (webcasts) from Berkeley.edu. In my tests NetXFer was the best software for the task. It is pretty easy to download multiple real video streams from webcast.berkeley.edu:

1. Open Internet Explorer and navigate to a web-page with the course details.
2. Right click on the web-page and select "Download all by NetXFer".
3. In the "Select URLs" dialog unselect everything, sort by the URL, select all URLs that contain "type=real" (click on the first one and then use holding shift press down arrow several times)
4. Click OK.

NetXfer can postprocess .RM metafiles and download rtsp:// .rm video streams automatically.

p.s. Although in my tests NetXfer was the best program for Berkeley webcasts, it wasn't perfect. Sometimes I had to re-download video lectures. The bummer is that NetXfer didn't show any error, so I had to check the lengths of all lectures manually.

p.p.s. I have never seen any DRM protected lectures at webcast.berkeley.edu. Please let me know if you find one.