Wow! Impressive.
And you can see why mirror lock up is such a useful facility. Look at the way the thing vibrates as the mirror slams up. How many cameras have it these days?
mirror weight is soo little comparing to camera weight, so it has no effect (or microscopic) in camera shake. only paranoic people use mirror lockup.
(ps. canon eos 400D has it too, but I never use it, no need for that).