Although the trade periodicals like Film Daily and BoxOffice (magazine) occasionally listed the two-reel “Warner Specials” (actually Technicolor Specials and Broadway Brevities) as “featurettes”, the term usually applied to Warner shorts lasting a full half hour or longer.
By the 1950s, however, the success of Walt Disney and others with such series as the True-Life Adventures made the “extra length” short subject fashionable as a double bill presentation.
The terms varied according to references, with a longer than usual Deep Adventure occasionally labeled a feature.
[3] Two titles hosted by Jack Webb of Dragnet (series) fame, 24 Hour Alert and The John Glenn Story, were Academy Award nominees.
Also between 1958 and 1961, Warner Brothers produced four of The Bell Laboratory Science Series for television, but utilizing longtime short film director/writer Owen Crump.