I got a reply back to my comment on the video about whether this system is real or not. It’s the real deal and is made by a Finnish company. Very impressive!
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RC truck excavator transport! THE OTHER WAY! (<8-minutes)
I have no idea if this method is used for real in Europe or if the modeler just came up with a clever idea and built it.
From what little information I can find on these RC trucks and construction equipment; the hydraulics are real and run around 175 PSI.