A user contributed patch from James Partington can be found Here

When applied you can specify a splash image to user and your media by seperating them with a “|”

/path/to/my/spash.jpg|/path/to/my/media.flv,300,150

This will be rolled into the next update, as soon as I can get some time to actually work on it!!

EDIT: despite the date of this post, no it’s not a joke ;-)