Begin from the supplied illustrated first frame. Locked front camera. Keep both open reservoirs and the low connecting tube fixed. First turn the single visible valve handle from its closed crosswise position to a position aligned with the horizontal tube. Only after that visible opening, let the higher left liquid level fall modestly while the lower right level rises during the same interval. Keep the transfer within the original connected tube and reservoirs. Do not jump liquid across the open gap, add a pipe, move a vessel or begin equalization before the valve opens. Stop with the two levels closer than at the start; complete equality and a precise flow rate are not required. Hold the open connected ending. No exterior pour or camera move.