I have already checked all the available video types on the Option Menu
I assume, you're talking about Options in MPC, right?
If so, it may be not enough.
Put your video DVD into your DVD drive.
Open windows Explorer.
Click on your DVD drive.
There will be subfolder, called: VIDEO_TS
Click on that subfolder.
In right pane, you'll see one, or more files with ".VOB" extension.
Right click on any of those files, click on
Open With.
Select MPC, or VLC as the program you want to play your movies with.
Click to select the
Always use this program to open these files check box to make this the default program to open files with the same file-name extension.
Click OK.
Re-insert your DVD, and you should be set.