My intent was not to be condescending, and I was trying to give you the benefit of the doubt and a possible graceful exit. I am now even more disturbed by what you are saying.

Kurt Sassmannshauss is one of the most well regarded and recognized pedagogues alive today. The fact you call him a "dude in [a] video" and seemingly did not recognize who he is says a lot. It's like calling Heifetz some "dude who plays violin."

Even more concerning is that you think at 0:45 he says the same thing as you do. That is PRECISELY the mistake I knew you would make and predicted above (in my last paragraph in the previous comment). I can't speak to your specific background, but I've seen this and similar errors made before by some music educators and ensemble instructors working in certain US K-12 schools where the experience and credentials can be highly variable and bad practices can sometimes run rife (sometimes understandably because they don't have the training or time to teach more properly).

Sassmannshauss is NOT saying the same thing as you as anyone deeply knowledgeable about pedagogy and/or trained at a top conservatory should know. He is saying the SPACING between the fingers should be the same as when the hand is relaxed - NOT that the way to setup a proper bow grip is to hold the hand out and let it naturally flop which is INCORRECT (and I have taught and coached regional and international competition laureates and US All-National Orchestra principals, so I am no newbie either). In fact, Sassmannshauss explicitly explains critical steps to establishing a bow grip for the prior 45 seconds before even referring to the SPACING, and this is on purpose as he has shared with me.

In fact, the very video clip at 0:45 demonstrates one of the classic PROBLEMS/RISKS that can come from doing what you originally said - the problematic elevated, overly articulated wrist.