I have no connection to either movie, but Musee de la Vie Wallonne (the apparent source for this YouTube) is on Cour des Mineurs in Lige

Les Amis du Musee D'Armes de Liege (PeteM's source for the movie) is on Place du March and appears to be another institution
http://www.grandcurtiusliege.be/collections/departement-des-armes

I could certainly be mistaken, but 'bootleg' implies stealing