Gramps Is in the Resistance
Papy fait de la résistance (original)
Starring Christian Clavier, Michel Galabru, Gérard Jugnot, Martin Lamotte, Dominique Lavanant, Jacqueline Maillan, Jacques Villeret, Josiane Balasko, Michel Blanc, Jean Carmet
It's a action & adventure and comedy movie, and has a rating of 6.7 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Austria.