This is a great video for early Horizons footage. It starts out as a 1978 film but the portion on Horizons is from a later film.
At 2:35 Horizons steals the show with it's amazingly corny song. Glad it didn't make the cut.
At 2:59 There's a sweet shot of an early version of the Diving Class scene. Underwater safety is no joke.
At 3:05 A dolphin would have been cool near Sea Castle but our seal friend did just fine. Look to the right of this frame. "swimming" Audio-Animatronic figures?! Was that replaced by the film clip of the diving class? I would gave rather seen AA's.
At 3:45 Paul Torrigino lending his incredible artistic skill to a model of the France Pavilion.
I would love to see all of the Horizons concept art and models.