In my previous professional life in IT and hardware industry I saw many NDAs signed. The reasons could be different: Protect the IP, avoid marketing blunder, avoid disclosing bugs or negative PR, etc. Usually, you do not tell to your contract partners the exact reasons. The NDA is usually very precise in what is allowed and what is not and it is up to the signing parties to either agree (and sign) or make a counter proposal. At the and it is bounding as any other contract, there is no additional mystery.
What I saw happened at @mixedrealityTV first vid, would not be acceptable in the corporate word. You cannot agree to NDA terms (whatever they are) and then try to manipulate the public to put pressure on your contract partner to lift some NDA restrictions. In corporate word, you do it, and next time you do not have a partner. I assume @mixedrealityTV did it out of the ignorance and not of the lack of respect, but it was very unprofessional anyway.
Next, his vid was really not saying anything I did not already know, so it gave a strong impression, he was just trying to profit from the situation - being the first and at the time the only one tester who had M1. My negative impression about him comes from there.
I do not know what exactly is in the NDA testers had to agree, but if it says no coverage before the testing is finished, I would suggest to keep the attitude recently presented by @SweViver. Stay low, out of sight, do your job, do not let others to get you upset and enjoy (or sweat) through your endeavor.
Spending the time and energy on trying to explain either your situation, or trying to figure out how to pass information to us without violating the NDA is completely unnecessary and counterproductive.