There are commercials on TV stations that feature classic reruns. How do they put these together?
For instance, I saw one last night that started out with Henry Winkler doing his famous Fonzie "He-y-y-y". Then there were clips from many other old show with other actors using a similar expression; "MASH", "Gomer Pyle", etc. Are these old shows somehow indexed so a producer can search for specific bits like this? Or do some people have an encyclopedic knowledge of the old shows and can easily find these? Or do people just watch them and make notes of excerptable moments like that to make limited indexes they can use?