They were both juiced, which was their 'natural' state at the time (late 1960s). I've seen them many times, on and off stage, both alone and together. Ben became slow (and sentimental), but Don could still play his ass off even when he hardly could stand upright. He drank three double whiskys and smoke a big reefer anyway before playing at all.
That clip from "JATP 1967" is in fact from Oct 1966. Saw Hawk that year with that package. Others were Dizzy, Clark Terry, Zoot Sims, James Moody, Teddy Wilson, Bob Cranshaw, Louie Bellson. That same year I saw Ayler and had seen Coltrane the year before. Memories.
Rather surprisingly, I found Wilson's better. Despite high expectations (or maybe because of them), Koloda's book is kind of a disaster, considering that it is supposed to be the result of years of work and research. I almost didn't find a single page without factual errors or ridiculous interpretations. It's good though that he spoke with Donald while he was still with us.
Some fine Sam Dockery solo piano (and talking) here: https://freshairarchive.org/guests/sam-dockery
Always had a weak spot for Sam Dockery ever since I first heard him in the early 1960s.
"Don Warren" = Don Moore (of 1963 New York Contemporary Five fame) and "Howard McGray" = Howard McRae (who also played in the 1962 Dixon-Shepp Quartet on Savoy.
Newman's was a disc recorder, not a wire recorder. He used large discs and recorded at 33 rpm (machines had that option). That's why his recordings were longer than the usual 3.5 min of the time.