flag those you dont want to be recognized as videos so, that they aren't.

tollesVideo.mp4 -> tollesVideo.fun

Now you will have to resort to a second mediaplayer i think... (like mplayer or something being indifferent of the .xxx)

EDIT: Lot of hassle.
You need to know where and what is recognized as video by the player to trick it.

EDIT2: one "?" suffices.