Trailers are an under-appreciated art form insofar that many times they’re seen as vehicles for showing footage, explaining films away, or showing their hand about what moviegoers can expect. Foreign, domestic, independent, big budget: What better way to hone your skills as a thoughtful moviegoer than by deconstructing these little pieces of advertising? This week we head over to record the wildlife of China, break out the cardboard in Africa, be enamored by the lives of strangers who impersonate…