Yeah, this is definitely more marketing hype that a behind-the-scenes documentary and I definitely agree that the lack of information about all aspects of the game is maddening. That being said, the way it's all been presented doesn't raise any major red flags for me at the moment as given the company's history it seems like the founder and owner wants to do things differently than other major gaming companies. Another thing he said about not previewing too much is that he wanted there to be surprises for the players which is something he feels is lacking in this day and age. As for the diversity, they said that they modeled various artistic "skeletons" for creatures, ships, and so on and the procedural algorithm randomizes the details that make the things up so I guess it all depends on how many "skeletons" they came up with. Through just the videos I posted though, you can already see a few similar animals so that may be a bad sign. All in all, like I've said before, I'm fairly certain that even if the experience gets repetitive fairly quickly the initial experience will be worth it for me. Just what they've shown alone, I'm pretty sure I'd get a ton of hours of enjoyment out of it, so I'm not concerned too much and am very excited.
Regarding IGN, I've been a member on their site since 1998 and their quality has declined significantly in favor of quantity IMO. Gone are the days of 5 page game reviews that drew me in and in are the days of "articles" being nothing but links to other, better sites and summaries of their reporting. What few genuine talents they have are pretty heavily overshadowed by everyone else. Still, they tend to get access when others don't due to their high profile nature and even if they aren't producing tons of quality content, what they aggregate is useful. As for this video in particular, it's obviously meant to promote rather than go in depth of all the inner workings of the game, but then again it is only the first piece they've released this month so who knows where they will go.