Re:RivaVX (Score 2, Interesting)

RivavX is just a frontend to ffmpeg, useful for win32 users. Combining this with some of the premade swf's from videospark makes for a nice progressive platform independent playback that works on almost all platforms, Flash v.7 is needed though.

Demo of a progressive flv player. Using that player it is even possible to create streaming webvideo without using Macromedias authoring enviroment.