Okay so a friend of mine had received a video file of a movie. Some how instead of having the normal icon the movie poster image is the actual video file. this is exactly what i want to do.
here's what it looks like. notice the windows arrow is still on the icon. if i double click it, the movie starts.
Welcome to the Forum,
What seemed to work for this person in this thread was itunes, They were trying to get the same thing you want. Have a look here,