Cool video, reminds me of the small components stamping area in the late 1970's-early 1980's at Oldsmobile in Lansing, MI. I'm not familiar with the tonnage calculations for stuff of that size. I Google'd "press tonnage for auto hood" and got a hit for an 1800-ton press. I worked as a coop student at the Oldsmobile stamping plant in Lansing for a term. The presses knocking out fenders, body sides, hoods, etc. were pretty big and made the floor shake.
A 12-ton shop press can shear a 1 3/4" diameter disk from 0.036" stainless with a punch/die with no rake in the punch. When I did this, it was stalling the air-over-hydraulic motor running my hydraulic jack; little pause and a big "bang" when the punch went through. I ground rake into the punch so it pierced the material in a small area and sheared the perimeter of the hole; the press was much happier.
I have a Tennsmith 37" stomp shear and can easily shear a 36" length of 0.036" sheet steel. Again, it starts the cut on the right side and shears progressively to the left. I weigh about 175 lbs., a couple hops is all it takes. I would imagine if it was trying to shear the entire length all at once I'd have to jump from a ladder!
Bruce