Here's the description of this performance from YouTube:
John Fahey performs "Red Pony" on Laura Weber's "Guitar Guitar" TV show in 1969. From the DVD "John Fahey in Concert and Interviews 1969 & 1996."The guitar is in open G tuning (I think).
I saw Fahey (1939-2001) open for his protegé Leo Kottke at Reed College in Portland back in 1970 (or maybe 1971). Fahey walked onto the stage, sat down on a stool, chugged a can of beer and plunged into a dazzling (but too short) 30-minute set without a word. At the end he got up and said, "now it's time for the guy you really came to hear," then walked out. There was no hint of irony in his comment: a very sad, even shocking, moment. I never saw him perform again even though he moved to Salem, just an hour down I-5, ten years later.
There's a rumor in my family that Fahey was a distant relation on our paternal grandmother's side, but I have no confirmation of this claim.