Robin, the moral of this story is that when you ask for advice on solving a problem you shouldn't present a solution, you should present the problem.

A variety of deep focus lenses, all for cinematography, have been patented. None uses a tiny aperture to get the effect. The link you posted shows near and distant subjects more-or-less equally illuminated. This isn't possible in general with artificial illumination as would be required with the usual frame rates, capture media, and a tiny aperture. That should have been a tipoff that a tiny aperture isn't the solution.

If you don't have much budget your choices come down to renting a proper deep focus lens or buying a split diopter. None of the effects in the video seem to have been achieved with a split diopter.