There's only one real reason to post videos and that is to advertise and sell the game.
People who know nothing of this sim will want to see something,blimey the amount of adverts on TV showing games [some ingame footage ,some not ] Advertising these types of product are increasing.
People will self seed the product via web hosting sites ,facebook,you tube etc so advertising will be painless for them so why are they holding back.
Tree was correct,the leaked video was the best hype on here for along time,i don't agree with the way it was done it should have been done officially and had that happened the leak wouldn't have been so interesting.
Ironically by keeping things so hidden they opened themselves up.
Here's hoping for something tomorrow in the update.