I haven't even made it to the video in question yet. I'm still on part 1 of their first mission.
I guess one question I have is this: did people actually see their game sessions, or did they only watch the "Why we won't be playing 6th Edition" video?
Having watched the two prologue missions and half of the first part of the first mission, the GM does seem to have some bias against the new ruleset even from the get-go. And while it seems like they do make some mistakes, some of which would have been cleared up by errata from what I can gather, it seems to me like they suffer from change fatigue after just a few hours in.
I'm curious to see if they improve at all over the next several hours before they eventually call it quits. And, I do hope there are other streamers out there who will do 6th Edition, because I do find them quite entertaining to watch.