YouTuber Miss Mello is a self-taught animator with a flair for creative juxtopositions. We've seen the 1973-1974 Animated Series. This variant sends the animation to Japan a decade later. The audio and scenes are from "The Trouble with Tribbles" -- the most overrated episode in the franchise.
There's a rumor that Miles O'Brien and Benjamin Sisko, who made an appearance in this story in the Deep Space Nine episode "Trials and Tribble-ations," appear in this video, but I haven't been able to spot them yet.
-via reddit
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