Can't believe this is coming out, along with all the other rip off DVD 'documentaries' on Tolkien we've seen over the last few years, when the greatest Tolkien documentary by far 'JRRT: A Film Portrait of JRR Tolkien' (with filmed interviews with Christopher, Priscilla & John Tolkien, Tom Shippey & Verlyn Flieger, plus film of Tolkien himself discussing his work) hasn't been available for years & was only ever released in VHS
Christopher's insights alone make it worth the search.