I must have seen this movie a hundred times. That particular character is an officer though. Since officers wore riding boots and bought all their own clothing, getting an allowance, rather than being kitted out by the unit as the rank and file were, it is not at all unusual to see riding breeches and riding boots worn even at the end of the war in Europe. Some officers bought enlisted mens jackets and trousers from the stores to wear in the field, adding their own insignia. As the war progressed, more and more officers were promoted from the ranks so there was more of a crossover of kit between enlisted and officer ranks. This was particularly true of the Waffen SS.The German system required officers to serve in the ranks first before being promoted Fahnrich and Oberfahnrich(Ensign)in Das Heer, or Junker, Oberjunker and Standartenoberjunker (Cadet Corporal,Sergeant and Warrant Officer) in the SS. It was not uncommon for platoon commanders to be trainee officers of this type, as they had to serve a period as a Cadet officer before being promoted Leutnant or Untersturmfuhrer.
From the point of insignia, officer cadets wore the insignia of their substantive rank, with two braids formed of NCO's tresse at the root of the shoulder strap. Senior NCO cadets (substantive Oberfeldwebel or Hauptfeldwebel, or Standartenoberjunker in the SS)could wear officers accessories, e.g. the silver cap cords, and silver edging to the NCO's collar patches in the SS.