Need to set up mime types on a web server or a specialised media server.

Then point real player or wap broswer to a load page to stream. It may be the network operator will block streaming. In this case you have to download the video stream locally first.

Steve

you would need 3G though.

baically what I did was google
"live streaming video phone"

and aparently it has been used even by fox, so it cannot be that difficult.
http://www.bizreport.com/2006/10/fox_used_streaming_video_on_cell_phone_to_break_ny_plane_crash_news .html