I bought the steam version a while back on sale. In chapter 3 it crashed very often. I decided to buy the gog version when it was also on sale, because I had heard reports it worked a bit better. It did. Yay for me, I was able to finish the game. Anecdotal but that's my story and I'm sticking to it. I still like steam, but the fact is drm can make games buggier than they are already. (Conversely, there can be bugs with taking drm out of a game as well, and every system is different.)
But heck, I wouldn't complain if they got those videos up on here. Kind of surprising they aren't, with all the stuff that is included. But that's only a reason if watching some making of video matters to you, most of these types of things are only mildly interesting.