Summary: To cut to the chase, the segment of interest is 4:07 to 8:23, as noted here; the video itself is hard to find any longer, even in official channels
they say there's no free lunch; if you aren't paying for hosting and serving of "your" videos, you're not the customer and those videos, once uploaded, aren't quite yours anymore
This past summer Richard M. Stallman (RMS) openly complained in a public event that the term "security" had come to mean all sorts of ridiculous things, including the very oppose of real security
In the long run, this site and its sister site (less overlap between them now) should hopefully become a popular destination for people who look for information, not chaff
