I've watched it yesterday. It was a pretty informative and cool interview. I was a little concerned at first because it seemed unprepared, but it turned out all right. A timestamp list would have been welcome for such a long video, to be honest (1h22' of interview); I almost made one but I got the idea too late.
Slava is a nice dev and he's obviously passionate. I agree with his analysis of the strengths and weaknesses of the game, and it's good that he acknowledged the lack of balance between exploration / combat / story / character build at the end of the game. Though they had a good recipe with the 30-30-30-10 rule (percent of each activity) and the idea of switching the type of activity frequently enough.
I skipped the rather long part about the books since I haven't read them, but I kept the references. Anyone read Roadside Picnic (Strugatsky) or Under the Dome (Stephen King)? And I didn't know that Matt wrote a book, it looks a little bit like the CRPG Book.