World War II battle in Vienna

[Red Army footage of Vienna Offensive of World War II] Silhouetted soldier at window with binoculars / Red Army soldiers move up slope toward building / VS tanks move in streets, artillery guns fire / building burns / VS tanks and armored personnel carriers drive past destroyed and burning buildings / VS tanks and gunfire on streets / soldiers assist wounded person as female Soviet military officer walks alongside and chides them / German POWs walk on street / LS down rubble-strewn street with damaged buildings; Votive Church stands in background; soldiers move on street toward it / pan down spire of St. Stephen's Cathedral, with smoke surrounding it / troops on street / soldiers run past base of the Holy Roman Emperor Francis II monument / VS soldiers inside (presumably) one of the palaces of Vienna, running up steps and moving around inside / VS smoke, fires, rubble near St. Stephen's Cathedral / Note: exact day not known; documentation incomplete