This video featuring Astor Piazzolla with his electric octet from 1975 is one of two in which he performs this piece, probably his last great melody actually resembling a tango.The other one is later and in black and white and survives in better shape. This one is previous and in color but survived in a very damaged condition and the soundtrack was spoiled (you can find the original version easily to confirm it). So I dubbed the commercial recording even though the video goes out of sync by a matter of a few seconds.