It's obviously metaphorical for preference for English Mustard vs preference for Ketchup, perhaps the American Civil war.
The ship they are in is shaped like a giant yellow mustard squeezy bottle. They are associated with yellow, as also shown inside the ship and on the decor for their grey clothing. There seems an allegience to English Mustard.
They Gorge on HotDogs and beat up a guy dressed in red. Ketchup began its popular ascent in America. He later wins. It could be metaphorical for the American Civil war of independence (Although I can only see that making sense up until just before the point that smaller English Mustard ship is taken into a larger red Ketchup ship).
Either that, or they just fancied a sauce / fight / hot dog based video.
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