Brand New Elvis 1956 Footage Discovered: Recently posted from the archives of WKY-TV is new and undiscovered footage of Elvis live in concert in Okalahoma City Auditorium, April 19th 1956.

see at 8.35

There is three minutes of stunning footage including live concert action - as well as Elvis backstage kissing the girls, greeting his fans and signing autographs.
This is a really stunning find. (sadly no audio was recorded)