A reader sent a link to a photograph published by Joe Gromelski in the current issue of Stars and Stripes, the US military newspaper.
Frankfurt, West Germany, March, 1956: The stars of the “Jazz at the Philharmonic” tour pose for a photo backstage at the Frankfurt Zoo Theater. In front are Herb Ellis and Ella Fitzgerald; in back, from left to right, are Oscar Peterson, Roy Eldridge, Ray Brown, Dizzy Gillespie, Illinois Jacquette, Gene Krupa and Flip Phillips.
There does not seem to be video of precisely this JATP combination of musicians, but from the same year, here is impresario Norman Granz introducing some of them, plus Jo Jones. Jones demonstrates that among drummers there is still a reason that he is known as Papa.
The now-you-see-him, now-you-don’t appearance of Nat Cole at the end of the clip makes it likely that the performance was not from Frankfurt but from Los Angeles and Cole’s television show. JATP got around in those days.