Get those videos converted in to .flv format, put up on a webserver somewhere and point a flash video player to it, check this http://www.jeroenwijering.com/?it

Get those videos converted in to .flv format, put up on a webserver somewhere and point a flash video player to it, check this http://www.jeroenwijering.com/?item=JW_FLV_Player http://www.jeroenwijering.com/?item=JW_FLV_Player (when it's up) like fooblahblah said, if you want want true proper streaming you'll need flash communication server or open sourced red5. There are many more steps involved but that is the general idea.