If you installed your Gruntmods edition and cutscenes doesn't play (doesn't ever appear).
Then, guys, here is the solution. You might want to give it a try.
First, you can get cutscenes by visiting https://gruntmods.com/cutscenes-and-extra-content/
After exe is complete, go to C:\Users\...\Gruntmods Studios\Dune 2000\movies
Copy files from C:\...\Dune 2000\movies to C:\...\Dune 2000\data\Movies
Within the config settings (launcher) set language to eng, and try checkboxes.
My config works well for me:
>Resolutin 640x400
>Renderer: DirectDraw
>Movies enabled yes
>Sounds enabled yes
>Force No-CD yes
>Language: eng
>Single Processor Affinity yes
>Disable Max Windowed Mode yes