To have the adjustability of the vise and the force-capability of a hydraulic press in a single tool - fantastic!
Don't delete the first video - just re-label it as "Capability" - it tells what your gizmo can do what neither a vise nor a hydraulic press are capable on its own, but what can be achieved when melding them into a single tool.
Do I see it right - as constructed the vise is capable of 2 tons of force?