Thank you Genseng for your reply.
Could you advise hoe for instand a 3 Mb SWF file becomes streamable?
I received some feedback that should be viewed as .flv using an .swf videoplayer. You refer to the videoplayer and the player starts an .flv movie. It then runs streaming like on YouTube etc.
However TW4 only accepts .swf files and I don't know how to fit a player.