I'll try one last time because I do not think continuing is worthwhile, but at least I should be understood.
The fellow in the video who so beautifully demonstrated what he was talking about, can be understood to be doing exactly what he says, and that what he says is exactly what he is doing. Now, if I were doing exactly what he does and then talked about it, I would use different words, for sure. But I think my words would also be an exact description of what I was doing. If I want to understand his description, I have to "translate" what he is saying to something I can understand about what he is doing. I think I was able to do that so I appreciated both what he did and what he said.
In this scheme there is no room for me to say he did not do what he says, or he cannot say what he does, or that if he did what he said it would not work, that what he says is wrong, or any number of other such conclusions of error. I think the furthest I could legitimately go in that direction would be that I may not be able to make the connection between what someone says and how I would understand it. That is, I might fail at translation. But if I fail, I certainly cannot conclude someone else was wrong.
What I hope I would do would be to say to myself, I don't get it, but the example is powerful, so I hope to make the connection between what he says and what I can understand and do.
What Dione Tucker and Magnussen is demonstrating is that holding their lips partly open, the airflow can get them to vibrate.
You can do that to I am sure, I do play like that, I know many players do that. (What I do when I play with a fuzzy sound is exaggerate that, open the aperture "to much" in the middle, to mention that in this was just to show my point, the Bernoulli effect create a vacum between the lips. You can fight the vacum, just letting the side of the lips close. I realize that talking about the fuzzy sound was misstake, it just made cofusions)
Many players use the "M" to close the lips and blow them apart, other (like I) blow the together. Both work.
In the pivot system the lips are hold together and blown apart. (Don Reinhardt wrote: not tongued apart, wich is not how it works, exept I did know a very good trumpet player who did just that)
What happens when the air is flowing, the lips vibrate and the sound is in the air is probably the same for many players. If you start with the lips closed the airflow will open the lips and the air flow will close them (Bernoulli) If you you start with the lips open the air will close them (Bernoulli) the standing wave will keep the vibrations steady within the series of partials.
(The experiment with the hairdryer is a good one!)