So you would say that if one correctly interprets the spirit of the law, new laws can be set up which positively supply jurisdiction as long as one can assume that a Pope would approve of them?

No, I would not say that. I would say that we are not permitted to be mindless in this matter, and that God gave us the use of reason for a reason, namely, to use in order to save our own souls.

I say that the primary reason that the law was established in the first place is for the good of the faithful and that it wholly applies under normal circuмstances, but we are not in normal circuмstances.

As such, applying our use of reason we must understand and accept that under the current circuмstances the law longer applies for the good of the faithful, rather, if and when it is applied is for the good of the enemy, therefore to the detriment of the faithful, therefore we have supplied jurisdiction.     

The good Archbishop Lefebvre knew and understood this very well, and this is pretty much what Fr. Hesse says in the first few sentences in your posted video. 

Although I cannot think of any instances myself, yes of course under the circuмstances supplied jurisdiction can be and likely is abused, yet for our part we cannot be overly concerned about it to the point that we avoid valid priests and sacraments and accept heretical priests doubtful sacraments. Our first concern is of course to save our own souls and for that, we need valid priests and valid sacraments.