Complex sentence: Willie Mosconi served as technical advisor on the film and shot a number of the trick shots in place of the actors, except for Gleason whose shots were his own and filmed in wide-angle to show the actor and the shot in the same frames.
Split into simpler sentences: Willie Mosconi served as technical advisor on the film and shot a number of the trick shots in place of the actors. All of Gleason's shots were his own; they were filmed in wide-angle to emphasized having the actor and the shot in the same frames.