I disagree with that. There is no reason to let youtubes play the game a few days or even a week before release. Pillars of Eternity is a small niche game and needed the publicity. Furthermore Bloodborne was coming out 2 days earlier.
Well, it's certainly up to discussion whether it's "needed" or not. I just think it'd be a good thing, especially for the PC crowd.
Witcher is the only big game at this time(Batman Arkham Knight being the next one more than a month later) Most of the let's players will show it anyway. There are no preorder bonuses and there won't be a price drop a few days after release. I don't see why it's important for CD Project Red that people buy the game a few days before release instead of one or two days after release when people will play it regulary and the reviews will be out. If people want "not controlled" impressions they can just wait for the release date and buy the game a few days later.
That's all true. So why showing them the game now over in Poland. If there is absolutely no difference between buying the game now or buying the game after release there is no point in showing the game to both journalists or youtubers before release - at all. But it seems like CDPR does think that it's wise to market the game to people before release nevertheless. They obviously WANT people to preorder the game. So I don't think your argumentation makes much sense up to that point. Giving the game to youtubers shortly before release would just be another marketing effort, additionally adding to the hype and media/scene/public visibility of the title.
If let's players start to play the game one week earlier, the internet will be full of spoilers and there is always a risk, that without DRM someone puts the game into the internet and it will be available before the offiicial release- a nightmare for Cd Project Red (and the honest buyers of the game)
Of course there is a risk of spoilers. But be honest - that's always the case with let's plays. People who watch them already know that. If you want to avoid spoilers don't watch let's play videos. There is no difference to that rule whether you play games before official release or after it.
And I also disagree about the pirate argument. CDPR already said more than once that people who want to pirate will pirate anyway and that it's up to them to offer the best service and experience to convince players to buy the game from them. Giving out Cities Skylines one week before release obviously didn't hurt sales much since the game was sold more than a million times in the first week - although it was very much a special interest/niche title just for PC. The pirate argument is also invalid for their apparently biggest core audience now: console gamers. Giving out the game to youtubers (you can of course also always restrict yourself to some very famous youtubers who have to lose something by leaking stuff...) wouldn't interfere with console sales like at all since it's just about the PC version.
The only real problem I see here is maybe the "jealousy" of normal customers who don't want other people (streamers/youtubers/media/whoever) to play the game before they can. But that's stupid since the media will get the game before anyway for reviews. They could also leak the game just like a youtuber could.