Pavane turns up live on other sources than youtube but have drawn a blank on yout track, I know they did a concert performance on a French music show called pop2, it was a bit strange as the shows weren't necessarily filmed in France, Lindisfarne did one, filmed in Aylesbury but with Rod Clements doing the intros to the songs in French. It would be a performance of around 25-45 minutes depending on what survives but might be a direction to look in. There's a lot of live performances by Brian Auger online covering around 50 years, I think it could be a case of trawling through them.