You do realize that the press build included ALL content in the game, except for future DLC, right?
Or, someone trying to get a boost to his channel, that doesn't even show up on the top 25 results of a YouTube search, even if you search for "Project CARS 2 PS4 Pro".
Not only logical, but more likely as well. Also, since on consoles everything is linked to MS/Sony accounts, launch dates can be verified. I don't even think that copies of consoles games would start before their official launch date.
Oh, they are clearly trustworthy then, enough said.
Ask yourself this instead: what do they really have to lose, compared to the possible gains to 2.1k subscribers and increased site traffic?