how funny, i was just reading this... then clicked the video link and was like... "no way!" as I made this video.
Just for your, or anyone else's information I did the animated lines by first projecting Photoshop in full screen mode and projecting it onto the model stage and tracing the outlines with the line tool, then I saved the outline pic I had created and used the it as a background image in the software "particle illusion" to trace the path of the particles. Although in this case I set the particles life to live forever and them just be white and simple. Hope this helps.
Please don't hesitate to get in contact or ask me any more questions ect.