I thoroughly enjoyed his first test (10 vises, from cheap to good). I don't think he meant for a minute to simulate actual vise use - except in the sense of finding where the weak points were in an accelerated fashion as opposed to using each one for 15-100 years... I thought it provided a lot of food for thought, particularly if you were designing or repairing your own. I've certainly seen plenty of vises (including some pretty nice ones) that were broken **somehow** - so it's not like they don't have weaknesses. Of course his real motivation is to showcase the superiority of his vise design (in the first test it was a welded-up predecessor to his 'hard tail' vise).
I haven't watched this newer video yet, but look forward to it.
GsT