Many have questioned why this "film" hasn't been remastered.  The simple reason is it was shot on videotape, not film. This special, and the ones that followed, were taped at NBC Studios in Burbank(when Frank leaves his car at the beginning of the show, that's the Tonight Show studio on his right!), along with "The Dean Martin Show", "Rowan & Martin's Laugh In", "The Hollywood Squares", and many more.  Everything shot at the Burbank complex, up until just a decade or so ago, was done on videotape, not film.  Unfortunately even broadcast quality videotape deteriorates over time.  My guess is that this special probably wasn't preserved on digital disc, until sometime in the 1980's.  If you look at the DVD's of the Dean Martin Show, or "The Tonight Show with Johnny Carson", you'll see that some of those master tapes have deteriorated as well.  It's a shame, but those were the cost cutting limitations that NBC offered at the time.  Also note that this special was shot on three different nights(hence the canned laughter at Sinatra's jokes).  The first installment was November 8th, 1965.  Sinatra returned at two different days that week to finish off the performance (it took at least a day to tear down and rebuild each of those elaborate sets).  It was broadcast on Thanksgiving night of '65. I have read that Frank was suffering from a severe cold the night he taped the "I've Got You Under My Skin" segment, and was very cranky to the directors, producers and everyone else in the studio that night.  Despite it all, he turned out a top notch performance, and I for one, am glad we have it, considering what NBC did to the first decade of Johnny Carson's material!