Thanks for your work on this. Have you considered posting a brief text summary along with your videos? That would make the information more accessible via a search in this forum or on the Web. And it would be helpful to those who might prefer or require an online translation to another language - or those of us with a hearing loss.
Also curious to know if you have performance comparisons that demonstrate the benefit of a (unsupported) memory upgrade in models where the upgrade worked. That information would help us make a more informed cost/risk/benefit analysis, based on our individual circumstances.