Not sure about your MPC issue, normally it should be displayed in the virtual cinema. Did you apply the Game Optimizer setting for MPC? It selects a suitable video renderer. If that fails, select “EVR (custom preset)” manually in the MPC options.
For 3D videos you have to select the content type on the image page of the vorpX ingame menu. You can choose between mono, sbs and over/under, and also swap left/right if necessary.
If auto setting the FOV fails for some reason, you may have to resort to doing it manually. For many games googling for “fov game name” yields short tutorials. And if there is no way at all for a game, you might have to resort to one of the workarounds that vorpX provides. Please check the Essential Game Hints in the vorpX help for details.