You can use RealAudio/Video on your web site by using HTTP Streaming. In order to use http streaming, you will need to create a .ram file that calls your Real audio/video file. (.rm file) The .ram file is a text file with an absolute URL. You can create this file with any text editor, such as notepad or pico in shell. This URL will need to be:

http://www.yourdomain.com/filename.rm

Then, in your html code, you link to the .ram file.