I’ve long liked Philip Glass’s Einstein on the Beach. I saw the 1984 revival at the Brooklyn Academy of Music, and was mesmerized by it. In 2014, the opera was revived again, and it toured a number of venues. Performances at the Théâtre du Châtelet, in Paris, were filmed, and, at the time, streamable on the internet. Now this film is available on DVD and Blu-Ray. (Amazon.com, Amazon UK)
It’s an important work in avant-garde theater and opera, and in music. Finally, we can see an excellent performance of this work at home.
Oh, and if you like Philip Glass, there’s a new box set of his Sony recordings.