I don't understand what anyone could have against Scott Manley 
Same here.
It annoyed me that a lot of the comments were saying that it looked too easy when he was clearly playing on "Easy" mode.
Have you never read the comments on any YouTube video? If its not "too easy", it is "too hard and I could never do that". You can't win.
Having said that, Scott Manley did post the the second mission a few days ago with him playing on Normal and with TrackIR. But I didn't check the comments, mostly I am interested in the opinion of the person making the video, not the commentators because they rarely add value on YouTube anyway.