With 'Bauhaus Spirit: 100 Years of Bauhaus', filmmakers Niels Bolbrinker and Thomas Tielsch tackle an ample project, and do so with multiple aims. To celebrate Bauhaus, the pioneering modernist design movement that stemmed from the post-World War I Weimar school of the same name, as founded by Walter Gropius, is to understand it — and so their documentary acts as both an ode and an explainer.