The Pretty Things on German TV, 1966. Absolutely live.
It is something of a cliche that in terms of image and attitude these guys made The Rolling Stones look like The Budapest String Quartet, but it is nonetheless true, I think. Although their hit singles (in Britain -- they made absolutely no impact in the States, for reasons I've never quite figured out) were as slick as anybody elses at the time, especially when compared to the above performance.
Also, re the drummer:
To paraphrase The Bonzo Dog Band -- wow, that cat is really expressing himself.