Found out the actual reason myself.
This game (elle) uses a very old video codec Indeo IV50 for its OP and animations.
Unfortunately this old codec had been terminated long ago and not included in Windows OS since around year 2000(?).
So if you want the game to play OP and animations, you have to find and install this Indeo IV50 video codec yourself.
Once installed, the game does play OP and animations well.