Vintage video (1968) via BBC of Nana Mouskouri & John Williams performing the beginning of Bachianas Brasileiras No.5 by Heitor Villa-Lobos (1887–1959). Too bad we don’t get the whole thing. Williams is so much more enjoyable to watch in ensemble since he can’t be as ultra subtle as when playing solo.
Amazon: Bachianas Brasileiras No.5 on Amazon.com (you can find the sheet music and cds but also a humourous electric guitar version…!)