Very little remains of The Tonight Show from the years Jack Paar hosted. What we have here is almost 19 minutes from the festivities from September 21, 1960 with Hermione Gingold, Shelley Berman and Cliff "Charley Weaver" Arquette, plus announcer Hugh Downs is in there. You may note that the conversation is clearly less planned and more spontaneous than anything you'd see on the major talk shows today. You may also notice that this is not The Tonight Show.
The show was originally called Tonight. After Paar had been there a while, it was quietly renamed The Jack Paar Show. When Paar announced his departure, it was quietly changed to The Jack Paar Tonight Show and then when he left, it became The Tonight Show. Here it is from not long before that happened…