Complex sentence: In November 2007, the documentary' was released, featuring unreleased footage of the 1970 Leeds appearance and a 1964 performance at the Railway Hotel when the group were The High Numbers.
Split into simpler sentences: In November 2007, the documentary' was released. The documentary includes footage not in earlier documentaries, including film from the 1970 Leeds University appearance and the 1964 performance at the Railway Hotel when they were The High Numbers.