How can I play a RealMedia stream?
That's weird. I could stream this perfectly on my Android 2.3 stock browser.

For you, I'd suggest you do the following :-


Download MX Video Player FREE (and a suitable codec for your phone)
Enter the URL rtsp://128.112.131.181:554/blackboard/cs/additive_combinatorics/1_luca_trevisan_350k.rm in your stock browser.
You'll see something like :


 The above URL for lazy beans: 

Click on the MX Video Player and your video should load properly. duh! :D