Here are some renderings of the ghostss.com online remixer.
The web site has around 3 gig of video loops that can be used to create an infinite quantity of ghosts.
Several layers of videos are remixed with effects and various mask modes depending on the choice taken on the web page.
I added some randomization in order to make sure that even if you pick twice the same settings the result is going to be anyway different....
Those are high quality renderings and it will be slow to load if you are on a small internet pipe or if my shared hosting is too busy, be patient.