Prolific, lyrical, and possessed of that entrepreneurial optimism which afflicts some who have seen the worst of what the world has to offer, David Wojnarowicz was a multivalent artist who survived a tormented childhood and decanted that bone-deep fury into his work. Chris Kim’s skittering collage of a documentary “Wojnarowicz” doesn’t explore his career from the outside but rather works ground up through his art to present an experiential plunge into the raw tumult of the New York art scene just before and following the onset of AIDS. It’s an effective method, similar to what Alex Winter recently drew on for his immersive but more standoffish “Zappa,” and likely the best way to view the life and career of an artist who drew so much on his own life and crossed genres with abandon.