Released to DVD and Amazon Prime on September 15th Most of us associate the Beach Boys with summer-soundtrack songs about surfing, cars and girls on the beach. And their staggering 100,000,000 records sold. Back in the 60’s, outside the music business, we didn't realize that Brian Wilson, the creative genius who wrote most of their music, was taking his place among American greats like George Gershwin, Rodgers and Hammerstein and Burt Bacharach. We just knew that when we pulled the sun roof back and crooned along on "Don’t Worry Baby," something deeper reeled us in: the sheer beauty and increasing complexity of the music.  The constant shifting from major to…