Turibio Santos plays Introdução aos Choros

Here's an archival video of Turibio Santos playing the rare Introdução aos Choros, with the Orquestra Sinfônica do Estado de São Paulo directed by Diogo Pacheco. The Introduction to Choros is a "Symphonic Overture" to the Choros series, and includes themes from a number of Choros. Note that the first Choros, for solo guitar, is played immediately following the Introdução.

The video is undated; my guess, based on hairstyles, would be late 1970s.